diff --git a/.gitignore b/.gitignore
index 40c473d13dd..19d96d0b046 100644
--- a/.gitignore
+++ b/.gitignore
@@ -67,3 +67,4 @@ tests/cases/user/*/**/*.d.ts
 !tests/cases/user/zone.js/
 !tests/cases/user/bignumber.js/
 !tests/cases/user/discord.js/
+tests/baselines/reference/dt
\ No newline at end of file
diff --git a/lib/typescript.d.ts b/lib/typescript.d.ts
index b6598e9f617..815cc7bf24a 100644
--- a/lib/typescript.d.ts
+++ b/lib/typescript.d.ts
@@ -4487,9 +4487,9 @@ declare namespace ts {
          * @param compilationSettings Some compilation settings like target affects the
          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
          * multiple copies of the same file for different compilation settings.
-         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * @param scriptSnapshot Text of the file. Only used if the file was not found
          * in the registry and a new one was created.
-         * @parm version Current version of the file. Only used if the file was not found
+         * @param version Current version of the file. Only used if the file was not found
          * in the registry and a new one was created.
          */
         acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
diff --git a/lib/typescriptServices.d.ts b/lib/typescriptServices.d.ts
index 4bce953f667..cbf7ad062d2 100644
--- a/lib/typescriptServices.d.ts
+++ b/lib/typescriptServices.d.ts
@@ -4487,9 +4487,9 @@ declare namespace ts {
          * @param compilationSettings Some compilation settings like target affects the
          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
          * multiple copies of the same file for different compilation settings.
-         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * @param scriptSnapshot Text of the file. Only used if the file was not found
          * in the registry and a new one was created.
-         * @parm version Current version of the file. Only used if the file was not found
+         * @param version Current version of the file. Only used if the file was not found
          * in the registry and a new one was created.
          */
         acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index a282e9d3a68..bb1e26ede8b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -251,6 +251,7 @@ namespace ts {
             getSuggestionForNonexistentProperty: (node, type) => getSuggestionForNonexistentProperty(node, type),
             getSuggestionForNonexistentSymbol: (location, name, meaning) => getSuggestionForNonexistentSymbol(location, escapeLeadingUnderscores(name), meaning),
             getBaseConstraintOfType,
+            getDefaultFromTypeParameter: type => type && type.flags & TypeFlags.TypeParameter ? getDefaultFromTypeParameter(type as TypeParameter) : undefined,
             resolveName(name, location, meaning) {
                 return resolveName(location, escapeLeadingUnderscores(name), meaning, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined, /*isUse*/ false);
             },
@@ -4054,15 +4055,15 @@ namespace ts {
             }
         }
 
-        function collectLinkedAliases(node: Identifier): Node[] {
+        function collectLinkedAliases(node: Identifier, setVisibility?: boolean): Node[] | undefined {
             let exportSymbol: Symbol;
             if (node.parent && node.parent.kind === SyntaxKind.ExportAssignment) {
-                exportSymbol = resolveName(node.parent, node.escapedText, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace | SymbolFlags.Alias, Diagnostics.Cannot_find_name_0, node, /*isUse*/ false);
+                exportSymbol = resolveName(node, node.escapedText, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace | SymbolFlags.Alias, /*nameNotFoundMessage*/ undefined, node, /*isUse*/ false);
             }
             else if (node.parent.kind === SyntaxKind.ExportSpecifier) {
                 exportSymbol = getTargetOfExportSpecifier(<ExportSpecifier>node.parent, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace | SymbolFlags.Alias);
             }
-            const result: Node[] = [];
+            let result: Node[];
             if (exportSymbol) {
                 buildVisibleNodeList(exportSymbol.declarations);
             }
@@ -4070,9 +4071,14 @@ namespace ts {
 
             function buildVisibleNodeList(declarations: Declaration[]) {
                 forEach(declarations, declaration => {
-                    getNodeLinks(declaration).isVisible = true;
                     const resultNode = getAnyImportSyntax(declaration) || declaration;
-                    pushIfUnique(result, resultNode);
+                    if (setVisibility) {
+                        getNodeLinks(declaration).isVisible = true;
+                    }
+                    else {
+                        result = result || [];
+                        pushIfUnique(result, resultNode);
+                    }
 
                     if (isInternalModuleImportEqualsDeclaration(declaration)) {
                         // Add the referenced top container visible
@@ -4231,7 +4237,7 @@ namespace ts {
         /** Return the inferred type for a binding element */
         function getTypeForBindingElement(declaration: BindingElement): Type {
             const pattern = declaration.parent;
-            const parentType = getTypeForBindingElementParent(pattern.parent);
+            let parentType = getTypeForBindingElementParent(pattern.parent);
             // If parent has the unknown (error) type, then so does this binding element
             if (parentType === unknownType) {
                 return unknownType;
@@ -4273,6 +4279,10 @@ namespace ts {
                     // or otherwise the type of the string index signature.
                     const text = getTextOfPropertyName(name);
 
+                    // Relax null check on ambient destructuring parameters, since the parameters have no implementation and are just documentation
+                    if (strictNullChecks && declaration.flags & NodeFlags.Ambient && isParameterDeclaration(declaration)) {
+                        parentType = getNonNullableType(parentType);
+                    }
                     const declaredType = getTypeOfPropertyOfType(parentType, text);
                     type = declaredType && getFlowTypeOfReference(declaration, declaredType) ||
                         isNumericLiteralName(text) && getIndexTypeOfType(parentType, IndexKind.Number) ||
@@ -15746,61 +15756,95 @@ namespace ts {
          *    except for candidates:
          *      * With no name
          *      * Whose meaning doesn't match the `meaning` parameter.
-         *      * Whose length differs from the target name by more than 0.3 of the length of the name.
+         *      * Whose length differs from the target name by more than 0.34 of the length of the name.
          *      * Whose levenshtein distance is more than 0.4 of the length of the name
          *        (0.4 allows 1 substitution/transposition for every 5 characters,
          *         and 1 insertion/deletion at 3 characters)
-         * Names longer than 30 characters don't get suggestions because Levenshtein distance is an n**2 algorithm.
          */
         function getSpellingSuggestionForName(name: string, symbols: Symbol[], meaning: SymbolFlags): Symbol | undefined {
-            const worstDistance = name.length * 0.4;
-            const maximumLengthDifference = Math.min(3, name.length * 0.34);
-            let bestDistance = Number.MAX_VALUE;
-            let bestCandidate = undefined;
+            const maximumLengthDifference = Math.min(2, Math.floor(name.length * 0.34));
+            let bestDistance = Math.floor(name.length * 0.4) + 1; // If the best result isn't better than this, don't bother.
+            let bestCandidate: Symbol | undefined;
             let justCheckExactMatches = false;
-            if (name.length > 30) {
-                return undefined;
-            }
-            name = name.toLowerCase();
+            const nameLowerCase = name.toLowerCase();
             for (const candidate of symbols) {
-                let candidateName = symbolName(candidate);
-                if (candidate.flags & meaning &&
-                    candidateName &&
-                    Math.abs(candidateName.length - name.length) < maximumLengthDifference) {
-                    candidateName = candidateName.toLowerCase();
-                    if (candidateName === name) {
-                        return candidate;
-                    }
-                    if (justCheckExactMatches) {
-                        continue;
-                    }
-                    if (candidateName.length < 3 ||
-                        name.length < 3 ||
-                        candidateName === "eval" ||
-                        candidateName === "intl" ||
-                        candidateName === "undefined" ||
-                        candidateName === "map" ||
-                        candidateName === "nan" ||
-                        candidateName === "set") {
-                        continue;
-                    }
-                    const distance = levenshtein(name, candidateName);
-                    if (distance > worstDistance) {
-                        continue;
-                    }
-                    if (distance < 3) {
-                        justCheckExactMatches = true;
-                        bestCandidate = candidate;
-                    }
-                    else if (distance < bestDistance) {
-                        bestDistance = distance;
-                        bestCandidate = candidate;
-                    }
+                const candidateName = symbolName(candidate);
+                if (!(candidate.flags & meaning && Math.abs(candidateName.length - nameLowerCase.length) <= maximumLengthDifference)) {
+                    continue;
+                }
+                const candidateNameLowerCase = candidateName.toLowerCase();
+                if (candidateNameLowerCase === nameLowerCase) {
+                    return candidate;
+                }
+                if (justCheckExactMatches) {
+                    continue;
+                }
+                if (candidateName.length < 3) {
+                    // Don't bother, user would have noticed a 2-character name having an extra character
+                    continue;
+                }
+                // Only care about a result better than the best so far.
+                const distance = levenshteinWithMax(nameLowerCase, candidateNameLowerCase, bestDistance - 1);
+                if (distance === undefined) {
+                    continue;
+                }
+                if (distance < 3) {
+                    justCheckExactMatches = true;
+                    bestCandidate = candidate;
+                }
+                else {
+                    Debug.assert(distance < bestDistance); // Else `levenshteinWithMax` should return undefined
+                    bestDistance = distance;
+                    bestCandidate = candidate;
                 }
             }
             return bestCandidate;
         }
 
+        function levenshteinWithMax(s1: string, s2: string, max: number): number | undefined {
+            let previous = new Array(s2.length + 1);
+            let current = new Array(s2.length + 1);
+            /** Represents any value > max. We don't care about the particular value. */
+            const big = max + 1;
+
+            for (let i = 0; i <= s2.length; i++) {
+                previous[i] = i;
+            }
+
+            for (let i = 1; i <= s1.length; i++) {
+                const c1 = s1.charCodeAt(i - 1);
+                const minJ = i > max ? i - max : 1;
+                const maxJ = s2.length > max + i ? max + i : s2.length;
+                current[0] = i;
+                /** Smallest value of the matrix in the ith column. */
+                let colMin = i;
+                for (let j = 1; j < minJ; j++) {
+                    current[j] = big;
+                }
+                for (let j = minJ; j <= maxJ; j++) {
+                    const dist = c1 === s2.charCodeAt(j - 1)
+                        ? previous[j - 1]
+                        : Math.min(/*delete*/ previous[j] + 1, /*insert*/ current[j - 1] + 1, /*substitute*/ previous[j - 1] + 2);
+                    current[j] = dist;
+                    colMin = Math.min(colMin, dist);
+                }
+                for (let j = maxJ + 1; j <= s2.length; j++) {
+                    current[j] = big;
+                }
+                if (colMin > max) {
+                    // Give up -- everything in this column is > max and it can't get better in future columns.
+                    return undefined;
+                }
+
+                const temp = previous;
+                previous = current;
+                current = temp;
+            }
+
+            const res = previous[s2.length];
+            return res > max ? undefined : res;
+        }
+
         function markPropertyAsReferenced(prop: Symbol, nodeForCheckWriteOnly: Node | undefined, isThisAccess: boolean) {
             if (prop &&
                 noUnusedIdentifiers &&
@@ -23335,6 +23379,9 @@ namespace ts {
 
         function checkExportSpecifier(node: ExportSpecifier) {
             checkAliasSymbol(node);
+            if (compilerOptions.declaration) {
+                collectLinkedAliases(node.propertyName || node.name, /*setVisibility*/ true);
+            }
             if (!(<ExportDeclaration>node.parent.parent).moduleSpecifier) {
                 const exportedName = node.propertyName || node.name;
                 // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
@@ -23372,6 +23419,10 @@ namespace ts {
             }
             if (node.expression.kind === SyntaxKind.Identifier) {
                 markExportAsReferenced(node);
+
+                if (compilerOptions.declaration) {
+                    collectLinkedAliases(node.expression as Identifier, /*setVisibility*/ true);
+                }
             }
             else {
                 checkExpressionCached(node.expression);
@@ -26243,14 +26294,17 @@ namespace ts {
         }
 
         function checkGrammarConstructorTypeParameters(node: ConstructorDeclaration) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(node, node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            const typeParameters = getEffectiveTypeParameterDeclarations(node);
+            if (typeParameters) {
+                const { pos, end } = isNodeArray(typeParameters) ? typeParameters : first(typeParameters);
+                return grammarErrorAtPos(node, pos, end - pos, Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
             }
         }
 
         function checkGrammarConstructorTypeAnnotation(node: ConstructorDeclaration) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            const type = getEffectiveReturnTypeNode(node);
+            if (type) {
+                return grammarErrorOnNode(type, Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
             }
         }
 
diff --git a/src/compiler/declarationEmitter.ts b/src/compiler/declarationEmitter.ts
index ebd2985dd45..dc76e0ddf50 100644
--- a/src/compiler/declarationEmitter.ts
+++ b/src/compiler/declarationEmitter.ts
@@ -1249,10 +1249,18 @@ namespace ts {
             writeLine();
         }
 
+        function bindingNameContainsVisibleBindingElement(node: BindingName): boolean {
+            return !!node && isBindingPattern(node) && some(node.elements, elem => !isOmittedExpression(elem) && isVariableDeclarationVisible(elem));
+        }
+
+        function isVariableDeclarationVisible(node: VariableDeclaration | BindingElement) {
+            return resolver.isDeclarationVisible(node) || bindingNameContainsVisibleBindingElement(node.name);
+        }
+
         function emitVariableDeclaration(node: VariableDeclaration | PropertyDeclaration | PropertySignature | ParameterDeclaration) {
             // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
             // so there is no check needed to see if declaration is visible
-            if (node.kind !== SyntaxKind.VariableDeclaration || resolver.isDeclarationVisible(node)) {
+            if (node.kind !== SyntaxKind.VariableDeclaration || isVariableDeclarationVisible(node)) {
                 if (isBindingPattern(node.name)) {
                     emitBindingPattern(<BindingPattern>node.name);
                 }
@@ -1324,14 +1332,14 @@ namespace ts {
             }
 
             function emitBindingPattern(bindingPattern: BindingPattern) {
-                // Only select non-omitted expression from the bindingPattern's elements.
+                // Only select visible, non-omitted expression from the bindingPattern's elements.
                 // We have to do this to avoid emitting trailing commas.
                 // For example:
                 //      original: var [, c,,] = [ 2,3,4]
                 //      emitted: declare var c: number; // instead of declare var c:number, ;
                 const elements: Node[] = [];
                 for (const element of bindingPattern.elements) {
-                    if (element.kind !== SyntaxKind.OmittedExpression) {
+                    if (element.kind !== SyntaxKind.OmittedExpression && isVariableDeclarationVisible(element)) {
                         elements.push(element);
                     }
                 }
@@ -1371,7 +1379,7 @@ namespace ts {
         }
 
         function isVariableStatementVisible(node: VariableStatement) {
-            return forEach(node.declarationList.declarations, varDeclaration => resolver.isDeclarationVisible(varDeclaration));
+            return forEach(node.declarationList.declarations, varDeclaration => isVariableDeclarationVisible(varDeclaration));
         }
 
         function writeVariableStatement(node: VariableStatement) {
@@ -1390,7 +1398,7 @@ namespace ts {
             else {
                 write("var ");
             }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, isVariableDeclarationVisible);
             write(";");
             writeLine();
         }
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 09319589da7..cd65bf945f4 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -3766,7 +3766,7 @@
         "category": "Error",
         "code": 90010
     },
-    "Import '{0}' from \"{1}\".": {
+    "Import '{0}' from module \"{1}\".": {
         "category": "Message",
         "code": 90013
     },
@@ -3886,13 +3886,5 @@
     "Install '{0}'": {
         "category": "Message",
         "code": 95014
-    },
-    "Import '{0}' = require(\"{1}\").": {
-        "category": "Message",
-        "code": 95015
-    },
-    "Import * as '{0}' from \"{1}\".": {
-        "category": "Message",
-        "code": 95016
     }
 }
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index b13aaac792f..cb28be4677a 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -3281,7 +3281,7 @@ namespace ts {
                 // Check for "(xxx yyy", where xxx is a modifier and yyy is an identifier. This
                 // isn't actually allowed, but we want to treat it as a lambda so we can provide
                 // a good error message.
-                if (isModifierKind(second) && lookAhead(nextTokenIsIdentifier)) {
+                if (isModifierKind(second) && second !== SyntaxKind.AsyncKeyword && lookAhead(nextTokenIsIdentifier)) {
                     return Tristate.True;
                 }
 
@@ -3298,7 +3298,7 @@ namespace ts {
                         return Tristate.True;
                     case SyntaxKind.QuestionToken:
                         nextToken();
-                        // If we have "(a?:" or "(a?," or "(a?=" or "(a?)" then it is definitely a lamnda.
+                        // If we have "(a?:" or "(a?," or "(a?=" or "(a?)" then it is definitely a lambda.
                         if (token() === SyntaxKind.ColonToken || token() === SyntaxKind.CommaToken || token() === SyntaxKind.EqualsToken || token() === SyntaxKind.CloseParenToken) {
                             return Tristate.True;
                         }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 9979139a913..68029b2f5e3 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2771,7 +2771,8 @@ namespace ts {
         getApparentType(type: Type): Type;
         getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
         getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
-        /* @internal */ getBaseConstraintOfType(type: Type): Type | undefined;
+        getBaseConstraintOfType(type: Type): Type | undefined;
+        getDefaultFromTypeParameter(type: Type): Type | undefined;
 
         /* @internal */ getAnyType(): Type;
         /* @internal */ getStringType(): Type;
@@ -3575,15 +3576,17 @@ namespace ts {
 
     export interface TypeVariable extends Type {
         /* @internal */
-        resolvedBaseConstraint: Type;
+        resolvedBaseConstraint?: Type;
         /* @internal */
-        resolvedIndexType: IndexType;
+        resolvedIndexType?: IndexType;
     }
 
     // Type parameters (TypeFlags.TypeParameter)
     export interface TypeParameter extends TypeVariable {
         /** Retrieve using getConstraintFromTypeParameter */
-        constraint: Type;        // Constraint
+        /* @internal */
+        constraint?: Type;        // Constraint
+        /* @internal */
         default?: Type;
         /* @internal */
         target?: TypeParameter;  // Instantiation target
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index ac152e4023a..80ca3bbdfad 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1463,7 +1463,7 @@ namespace ts {
 
     /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
     /// assignments we treat as special in the binder
-    export function getSpecialPropertyAssignmentKind(expr: ts.BinaryExpression): SpecialPropertyAssignmentKind {
+    export function getSpecialPropertyAssignmentKind(expr: BinaryExpression): SpecialPropertyAssignmentKind {
         if (!isInJavaScriptFile(expr)) {
             return SpecialPropertyAssignmentKind.None;
         }
@@ -1615,15 +1615,15 @@ namespace ts {
 
         function getJSDocCommentsAndTagsWorker(node: Node): void {
             const parent = node.parent;
+            if (parent && (parent.kind === SyntaxKind.PropertyAssignment || getNestedModuleDeclaration(parent))) {
+                getJSDocCommentsAndTagsWorker(parent);
+            }
             // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
             // /**
             //   * @param {number} name
             //   * @returns {number}
             //   */
             // var x = function(name) { return name.length; }
-            if (parent && (parent.kind === SyntaxKind.PropertyAssignment || parent.kind === SyntaxKind.ExpressionStatement || getNestedModuleDeclaration(parent))) {
-                getJSDocCommentsAndTagsWorker(parent);
-            }
             if (parent && parent.parent &&
                 (getSingleVariableOfVariableStatement(parent.parent, node) || getSourceOfAssignment(parent.parent))) {
                 getJSDocCommentsAndTagsWorker(parent.parent);
@@ -1631,6 +1631,10 @@ namespace ts {
             if (parent && parent.parent && parent.parent.parent && getSingleInitializerOfVariableStatement(parent.parent.parent, node)) {
                 getJSDocCommentsAndTagsWorker(parent.parent.parent);
             }
+            if (isBinaryExpression(node) && getSpecialPropertyAssignmentKind(node) !== SpecialPropertyAssignmentKind.None ||
+                node.kind === SyntaxKind.PropertyAccessExpression && node.parent && node.parent.kind === SyntaxKind.ExpressionStatement) {
+                getJSDocCommentsAndTagsWorker(parent);
+            }
 
             // Pull parameter comments from declaring function as well
             if (node.kind === SyntaxKind.Parameter) {
@@ -3521,29 +3525,6 @@ namespace ts {
         return 0;
     }
 
-    export function levenshtein(s1: string, s2: string): number {
-        let previous: number[] = new Array(s2.length + 1);
-        let current: number[] = new Array(s2.length + 1);
-        for (let i = 0; i < s2.length + 1; i++) {
-            previous[i] = i;
-            current[i] = -1;
-        }
-        for (let i = 1; i < s1.length + 1; i++) {
-            current[0] = i;
-            for (let j = 1; j < s2.length + 1; j++) {
-                current[j] = Math.min(
-                    previous[j] + 1,
-                    current[j - 1] + 1,
-                    previous[j - 1] + (s1[i - 1] === s2[j - 1] ? 0 : 2));
-            }
-            // shift current back to previous, and then reuse previous' array
-            const tmp = previous;
-            previous = current;
-            current = tmp;
-        }
-        return previous[previous.length - 1];
-    }
-
     export function skipAlias(symbol: Symbol, checker: TypeChecker) {
         return symbol.flags & SymbolFlags.Alias ? checker.getAliasedSymbol(symbol) : symbol;
     }
diff --git a/src/harness/unittests/tsserverProjectSystem.ts b/src/harness/unittests/tsserverProjectSystem.ts
index 2ca7d4e21dd..ff2db0f9ee6 100644
--- a/src/harness/unittests/tsserverProjectSystem.ts
+++ b/src/harness/unittests/tsserverProjectSystem.ts
@@ -232,7 +232,7 @@ namespace ts.projectSystem {
             return this.executeCommand(<T>request);
         }
 
-        public event<T>(body: T, eventName: string) {
+        public event<T extends object>(body: T, eventName: string) {
             this.events.push(server.toEvent(eventName, body));
             super.event(body, eventName);
         }
@@ -1561,7 +1561,11 @@ namespace ts.projectSystem {
                 path: "/a/b/foo.js",
                 content: ""
             };
-            const host = createServerHost([file1, file2, customTypesMap]);
+            const file3 = {
+                path: "/a/b/Bacon.js",
+                content: "let y = 5"
+            };
+            const host = createServerHost([file1, file2, file3, customTypesMap]);
             const projectService = createProjectService(host);
             try {
                 projectService.openExternalProject({ projectFileName: "project", options: {}, rootFiles: toExternalFiles([file1.path, file2.path]), typeAcquisition: { enable: true } });
diff --git a/src/harness/unittests/typingsInstaller.ts b/src/harness/unittests/typingsInstaller.ts
index 393d55a5ea4..d0038902ae7 100644
--- a/src/harness/unittests/typingsInstaller.ts
+++ b/src/harness/unittests/typingsInstaller.ts
@@ -1018,7 +1018,7 @@ namespace ts.projectSystem {
                 }
             };
             session.executeCommand(changeRequest);
-            host.checkTimeoutQueueLengthAndRun(0); // This enqueues the updategraph and refresh inferred projects
+            host.checkTimeoutQueueLengthAndRun(2); // This enqueues the updategraph and refresh inferred projects
             const version2 = proj.getCachedUnresolvedImportsPerFile_TestOnly().getVersion();
             assert.equal(version1, version2, "set of unresolved imports should not change");
         });
diff --git a/src/lib/dom.generated.d.ts b/src/lib/dom.generated.d.ts
index c5e5e713ad2..001c63b44a1 100644
--- a/src/lib/dom.generated.d.ts
+++ b/src/lib/dom.generated.d.ts
@@ -15029,6 +15029,8 @@ interface SVGElementTagNameMap {
     "view": SVGViewElement;
 }
 
+interface ElementTagNameMap extends HTMLElementTagNameMap, SVGElementTagNameMap { }
+
 declare var Audio: { new(src?: string): HTMLAudioElement; };
 declare var Image: { new(width?: number, height?: number): HTMLImageElement; };
 declare var Option: { new(text?: string, value?: string, defaultSelected?: boolean, selected?: boolean): HTMLOptionElement; };
diff --git a/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 03965fb2b07..83479d879c5 100644
--- a/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/chs/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -144,30 +144,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[类属性声明中的计算属性名称必须引用类型为文本类型或“唯一符号”类型的表达式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[方法重载中的计算属性名称必须引用类型为文本类型或“唯一符号”类型的表达式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[类型文本中的计算属性名称必须引用类型为文本类型或“唯一符号”类型的表达式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[环境上下文中的计算属性名称必须引用类型为文本类型或“唯一符号”类型的表达式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[接口中的计算属性名称必须引用必须引用类型为文本类型或“唯一符号”的表达式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -291,6 +306,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[此上下文中不允许明确的赋值断言 "!"。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -507,12 +531,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[类型为“唯一符号”的类的属性必须同时为“静态”和“只读”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[类型为“唯一符号”的接口或类型文本的属性必须是“只读”]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -765,6 +795,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[类型为“唯一符号”的变量必须是“常量”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2583,6 +2616,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[重复声明“{0}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2796,6 +2832,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[启用类中属性初始化的严格检查。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2937,6 +2982,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[应有 {0} 个参数，但获得的数量大于等于 {1}。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2970,6 +3018,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[应有至少 {0} 个参数，但获得的数量大于等于 {1}。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3717,32 +3768,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[从 {1} 导入 {0}。]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[导入“{0}”= 要求("{1}")。]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[从“{1}”将 * 作为“{0}”导入。]]></Val>
+            <Val><![CDATA[从模块“{1}”导入“{0}”。]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4506,12 +4536,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出接口的方法“{0}”具有或正在使用私有模块“{2}”中的名称“{1}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出接口的方法“{0}”具有或正在使用专用名称“{1}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5439,6 +5475,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[属性“{0}”没有初始化表达式，且未在构造函数中明确赋值。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5559,6 +5604,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[在赋值前使用了属性“{0}”。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5661,18 +5715,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出类的公共方法“{0}”具有或正在使用外部模块“{2}”中的名称“{1}”，但不能为其命名。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出类的公共方法“{0}”具有或正在使用私有模块“{2}”中的名称“{1}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出类的公共方法“{0}”具有或正在使用专用名称“{1}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5706,18 +5769,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出类的公共静态方法“{0}”具有或正在使用外部模块“{2}”中的名称“{1}”，但不能为其命名。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出类的公共静态方法“{0}”具有或正在使用私有模块“{2}”中的名称“{1}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[导出类的公共静态方法“{0}”具有或正在使用专用名称“{1}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6510,6 +6582,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[后续属性声明必须属于同一类型。属性“{0}”在“{2}”中必须为类型“{1}”，但此处却为类型“{3}”。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6738,6 +6813,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[“{0}”的推断类型引用不可访问的“{1}”类型。需要类型批注。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8790,18 +8868,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[此处不允许“唯一符号”类型。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[“唯一符号”类型仅可在变量语句中的变量上使用。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[不可在具有绑定名称的变量声明中使用“唯一符号”类型。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 425b451c38c..fb4dfda449c 100644
--- a/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/cht/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -144,30 +144,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[類別屬性宣告中的計算屬性名稱必須參考型別為常值型別或 'unique symbol' 型別的運算式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[方法多載中的計算屬性名稱必須參考型別為常值型別或 'unique symbol' 型別的運算式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型別常值中的計算屬性名稱必須參考型別為常值型別或 'unique symbol' 型別的運算式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[環境內容中的計算屬性名稱必須參考型別為常值型別或 'unique symbol' 型別的運算式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[介面中的計算屬性名稱必須參考型別為常值型別或 'unique symbol' 型別的運算式。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -291,6 +306,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[此內容不允許明確的指派判斷提示 '!'。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -507,12 +531,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型別為 'unique symbol' 型別的類別屬性必須同時為 'static' 與 'readonly'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型別為 'unique symbol' 型別的介面或型別常值屬性必須是 'readonly'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -765,6 +795,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型別為 'unique symbol' 型別的變數必須是 'const'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2583,6 +2616,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[重複宣告 '{0}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2796,6 +2832,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[啟用類別中屬性初始化的 strict 檢查。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2937,6 +2982,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[應有 {0} 個引數，但得到 {1} 個或更多。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2970,6 +3018,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[應有至少 {0} 個引數，但得到 {1} 個或更多。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3717,32 +3768,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[從 "{1}" 匯入 '{0}'。]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[匯入 '{0}' = 需要 ("{1}")。]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[將 * 從 "{1}" 匯入成 '{0}' 。]]></Val>
+            <Val><![CDATA[從模組 "{1}" 匯入 '{0}'。]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4506,12 +4536,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出介面的方法 '{0}' 具有或使用私用模組 '{2}' 的名稱 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出介面的方法 '{0}' 具有或使用私用名稱 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5439,6 +5475,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[屬性 '{0}' 沒有初始設定式，且未在建構函式中明確指派。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5559,6 +5604,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[屬性 '{0}' 已在指派之前使用。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5661,18 +5715,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出類別的公用方法 '{0}' 具有或使用外部模組 {2} 的名稱 '{1}'，但無法命名。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出類別的公用方法 '{0}' 具有或使用私用模組 '{2}' 的名稱 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出類別的公用方法 '{0}' 具有或使用私用名稱 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5706,18 +5769,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出類別的公用靜態方法 '{0}' 具有或使用外部模組 {2} 的名稱 '{1}'，但無法命名。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出類別的公用靜態方法 '{0}' 具有或使用私用模組 '{2}' 的名稱 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[匯出類別的公用靜態方法 '{0}' 具有或使用私用名稱 '{1}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6510,6 +6582,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[後續的屬性宣告必須具有相同的類型。屬性 '{0}' 在 {2} 具有型別 '{1}'，但在這裡具有型別 '{3}'。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6738,6 +6813,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 的推斷型別參考了無法存取的 '{1}' 型別。必須有型別註解。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8790,18 +8868,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[這裡不允許 'unique symbol' 型別。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[只有變數陳述式中的變數允許 'unique symbol' 型別。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['unique symbol' 型別無法用在具有繫結名稱的變數宣告上。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 20ef6bead25..de3f3987097 100644
--- a/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -150,47 +150,47 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a class property declaration must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v deklaraci vlastnosti třídy musí přímo odkazovat na předdefinovaný symbol.]]></Val>
+            <Val><![CDATA[Název vypočítané vlastnosti v deklaraci vlastnosti třídy musí odkazovat na výraz, jehož typ je literál nebo jedinečný symbol.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a method overload must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v přetížení metody musí přímo odkazovat na předdefinovaný symbol.]]></Val>
+            <Val><![CDATA[Název vypočítané vlastnosti v přetížené metodě musí odkazovat na výraz, jehož typ je literál nebo jedinečný symbol.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a type literal must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v literálu typu musí přímo odkazovat na předdefinovaný symbol.]]></Val>
+            <Val><![CDATA[Název vypočítané vlastnosti v literálu typu musí odkazovat na výraz, jehož typ je literál nebo jedinečný symbol.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an ambient context must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v ambientním kontextu musí přímo odkazovat na předdefinovaný symbol.]]></Val>
+            <Val><![CDATA[Název vypočítané vlastnosti v ambientním kontextu musí odkazovat na výraz, jehož typ je literál nebo jedinečný symbol.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an interface must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v rozhraní musí přímo odkazovat na předdefinovaný symbol.]]></Val>
+            <Val><![CDATA[Název vypočítané vlastnosti v rozhraní musí odkazovat na výraz, jehož typ je literál nebo jedinečný symbol.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -315,6 +315,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -528,6 +534,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Vlastnost třídy, jejíž typ je jedinečný symbol, musí být static a readonly.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Vlastnost rozhraní nebo literálu typu, jehož typ je jedinečný symbol, musí být readonly.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_required_parameter_cannot_follow_an_optional_parameter_1016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A required parameter cannot follow an optional parameter.]]></Val>
@@ -774,6 +798,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Proměnná, jejíž typ je jedinečný symbol, musí být const.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_yield_expression_is_only_allowed_in_a_generator_body_1163" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A 'yield' expression is only allowed in a generator body.]]></Val>
@@ -2586,6 +2619,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Duplicitní deklarace pro: {0}]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Duplicate_function_implementation_2393" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate function implementation.]]></Val>
@@ -2796,6 +2838,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Povolí striktní kontrolu inicializace vlastností ve třídách.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2934,11 +2985,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_0_arguments_but_got_a_minimum_of_1_2556" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Očekával se tento počet argumentů: {0}. Předalo se jich minimálně {1}.]]></Val>
+            <Val><![CDATA[Očekával se tento počet argumentů: {0}. Počet předaných argumentů: {1} nebo více.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2970,11 +3021,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected at least {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Očekával se aspoň tento počet argumentů: {0}. Předalo se jich minimálně {1}.]]></Val>
+            <Val><![CDATA[Očekával se aspoň tento počet argumentů: {0}. Počet předaných argumentů: {1} nebo více.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4131,6 +4182,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";JSDoc_may_only_appear_in_the_last_parameter_of_a_signature_8028" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[JSDoc '...' may only appear in the last parameter of a signature.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[JSDoc ... se může nacházet jen v posledním parametru signatury.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";JSDoc_param_tag_has_name_0_but_there_is_no_parameter_with_that_name_8024" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[JSDoc '@param' tag has name '{0}', but there is no parameter with that name.]]></Val>
@@ -4500,6 +4560,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda {0} z exportovaného rozhraní má nebo používá název {1} z privátního modulu {2}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda {0} z exportovaného rozhraní má nebo používá privátní název {1}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Modifiers_cannot_appear_here_1184" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Modifiers cannot appear here.]]></Val>
@@ -5424,6 +5502,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Vlastnost {0} nemá žádný inicializátor a není jednoznačně přiřazena v konstruktoru.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5544,6 +5631,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Vlastnost {0} je použitá před přiřazením.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5643,6 +5739,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Veřejná metoda {0} z exportované třídy má nebo používá název {1} z externího modulu {2}, ale nedá se pojmenovat.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Veřejná metoda {0} z exportované třídy má nebo používá název {1} z privátního modulu {2}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Veřejná metoda {0} z exportované třídy má nebo používá privátní název {1}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -5670,6 +5793,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Veřejná statická metoda {0} z exportované třídy má nebo používá název {1} z externího modulu {2}, ale nedá se pojmenovat.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Veřejná statická metoda {0} z exportované třídy má nebo používá název {1} z privátního modulu {2}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Veřejná statická metoda {0} z exportované třídy má nebo používá privátní název {1}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -6456,6 +6606,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Deklarace následných vlastností musí obsahovat stejný typ. Vlastnost {0} musí být typu {1} v {2}, ale tady je typu {3}.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Subsequent_variable_declarations_must_have_the_same_type_Variable_0_has_type_1_at_2_but_here_has_typ_2403" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent variable declarations must have the same type.  Variable '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
@@ -6678,11 +6837,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary.]]></Val>
+          <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Odvozený typ {0} odkazuje na nepřístupný typ this. Musí se použít anotace typu.]]></Val>
+            <Val><![CDATA[Odvozený typ {0} odkazuje na nepřístupný typ {1}. Musí se použít anotace typu.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8733,6 +8892,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Typy „jedinečný symbol“ tady nejsou povolené.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Typy „jedinečný symbol“ jsou povolené jen u proměnných v příkazu proměnné.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Typy „jedinečný symbol“ nejde použít v deklaraci proměnné s názvem vazby.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";with_statements_are_not_allowed_in_an_async_function_block_1300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['with' statements are not allowed in an async function block.]]></Val>
diff --git a/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl
index dfba55014e0..958d9774e8e 100644
--- a/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/deu/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -144,30 +144,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ein berechneter Eigenschaftenname in einer Deklaration einer Klasseneigenschaft muss auf einen Ausdruck verweisen, dessen Typ ein Literal oder ein "unique symbol"-Typ ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ein berechneter Eigenschaftenname in einer Methodenüberladung muss auf einen Ausdruck verweisen, dessen Typ ein Literal oder ein "unique symbol"-Typ ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ein berechneter Eigenschaftenname in einem Typliteral muss auf einen Ausdruck verweisen, dessen Typ ein Literal oder ein "unique symbol"-Typ ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ein berechneter Eigenschaftenname in einem Umgebungskontext muss auf einen Ausdruck verweisen, dessen Typ ein Literal oder ein "unique symbol"-Typ ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ein berechneter Eigenschaftenname in einer Schnittstelle muss auf einen Ausdruck verweisen, dessen Typ ein Literal oder ein "unique symbol"-Typ ist.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -291,6 +306,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -507,12 +528,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Eine Eigenschaft einer Klasse, deren Typ ein "unique symbol"-Typ ist, muss sowohl "static" als auch "readonly" sein.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Eine Eigenschaft einer Schnittstelle oder eines Typliterals, deren Typ ein "unique symbol"-Typ ist, muss "readonly" sein.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -762,6 +789,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Eine Variable, deren Typ ein "unique symbol"-Typ ist, muss "const" sein.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2574,6 +2604,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Doppelte Deklaration "{0}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2787,6 +2820,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Aktivieren Sie die strenge Überprüfung der Eigenschafteninitialisierung in Klassen.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2928,6 +2970,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[{0} Argumente wurden erwartet, empfangen wurden aber mindestens {1}.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2961,6 +3006,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Mindestens {0} Argumente wurden erwartet, empfangen wurden aber mindestens {1}.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -4494,12 +4542,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die Methode "{0}" der exportierten Schnittstelle besitzt oder verwendet den Namen "{1}" aus dem privaten Modul "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die Methode "{0}" der exportierten Schnittstelle besitzt oder verwendet den privaten Namen "{1}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5424,6 +5478,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die Eigenschaft "{0}" weist keinen Initialisierer auf und ist im Konstruktor nicht definitiv zugewiesen.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5544,6 +5607,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die Eigenschaft "{0}" wird vor ihrer Zuweisung verwendet.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5646,18 +5718,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die öffentliche Methode "{0}" der exportierten Klasse besitzt oder verwendet den Namen "{1}" aus dem externen Modul "{2}", kann aber nicht benannt werden.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die öffentliche Methode "{0}" der exportierten Klasse besitzt oder verwendet den Namen "{1}" aus dem privaten Modul "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die öffentliche Methode "{0}" der exportierten Klasse besitzt oder verwendet den privaten Namen "{1}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5691,18 +5772,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die öffentliche statische Methode "{0}" der exportierten Klasse besitzt oder verwendet den Namen "{1}" aus dem externen Modul "{2}", kann aber nicht benannt werden.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die öffentliche statische Methode "{0}" der exportierten Klasse besitzt oder verwendet den Namen "{1}" aus dem privaten Modul "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Die öffentliche statische Methode "{0}" der exportierten Klasse besitzt oder verwendet den privaten Namen "{1}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6489,6 +6579,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nachfolgende Eigenschaftendeklarationen müssen den gleichen Typ aufweisen. Die Eigenschaft "{0}" muss bei "{2}" den Typ "{1}" aufweisen, ist hier aber vom Typ "{3}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6717,6 +6810,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Der abgeleitete Typ von "{0}" verweist auf einen Typ "{1}", auf den nicht zugegriffen werden kann. Eine Typanmerkung ist erforderlich.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8769,18 +8865,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA["unique symbol"-Typen sind hier nicht zulässig.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA["unique symbol"-Typen sind nur für Variablen in einer Variablenanweisung zulässig.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA["unique symbol"-Typen dürfen für eine Variablendeklaration mit einem Bindungsnamen nicht verwendet werden.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl
index d22a3ecd34c..e2a933198cf 100644
--- a/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/esn/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -150,47 +150,47 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a class property declaration must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nombre de propiedad calculada de una declaración de propiedad de clase debe hacer referencia directamente a un símbolo integrado.]]></Val>
+            <Val><![CDATA[Un nombre de propiedad calculada en una declaración de propiedad de clase debe hacer referencia a una expresión que sea de tipo literal o "unique symbol".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a method overload must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nombre de propiedad calculada de una sobrecarga de método debe hacer referencia directamente a un símbolo integrado.]]></Val>
+            <Val><![CDATA[Un nombre de propiedad calculada en una sobrecarga de método debe hacer referencia a una expresión que sea de tipo literal o "unique symbol".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a type literal must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nombre de propiedad calculada de un literal de tipo debe hacer referencia directamente a un símbolo integrado.]]></Val>
+            <Val><![CDATA[Un nombre de propiedad calculada en un literal de tipo debe hacer referencia a una expresión que sea de tipo literal o "unique symbol".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an ambient context must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nombre de propiedad calculada de un contexto de ambiente debe hacer referencia directamente a un símbolo integrado.]]></Val>
+            <Val><![CDATA[Un nombre de propiedad calculada en un contexto de ambiente debe hacer referencia a una expresión que sea de tipo literal o "unique symbol".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an interface must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nombre de propiedad calculada de una interfaz debe hacer referencia directamente a un símbolo integrado.]]></Val>
+            <Val><![CDATA[Un nombre de propiedad calculada en una interfaz debe hacer referencia a una expresión que sea de tipo literal o "unique symbol".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -315,6 +315,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[En este contexto no se permite una aserción de asignación definitiva "!".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -528,6 +537,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una propiedad de una clase cuyo tipo sea "unique symbol" debe ser "static" y "readonly".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una propiedad de una interfaz o un literal de tipo cuyo tipo sea "unique symbol" debe ser "readonly".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_required_parameter_cannot_follow_an_optional_parameter_1016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A required parameter cannot follow an optional parameter.]]></Val>
@@ -774,6 +801,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una variable cuyo tipo sea "unique symbol" debe ser "const".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_yield_expression_is_only_allowed_in_a_generator_body_1163" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A 'yield' expression is only allowed in a generator body.]]></Val>
@@ -2586,6 +2622,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Declaración duplicada "{0}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Duplicate_function_implementation_2393" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate function implementation.]]></Val>
@@ -2796,6 +2841,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Habilite la comprobación estricta de inicialización de propiedades en las clases.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2934,11 +2988,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_0_arguments_but_got_a_minimum_of_1_2556" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Se esperaban {0} argumentos, pero se obtuvo un mínimo de {1}.]]></Val>
+            <Val><![CDATA[Se esperaban {0} argumentos, pero se obtuvieron {1} o más.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2970,11 +3024,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected at least {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Se esperaban al menos {0} argumentos, pero se obtuvo un mínimo de {1}.]]></Val>
+            <Val><![CDATA[Se esperaban al menos {0} argumentos, pero se obtuvieron {1} o más.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -3723,32 +3777,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importe "{0}" desde "{1}".]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importación de "{0}" = requiere ("{1}").]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importe * como "{0}" desde "{1}".]]></Val>
+            <Val><![CDATA[Importar "{0}" desde el módulo "{1}".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4509,6 +4542,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método "{0}" de la interfaz exportada tiene o usa el nombre "{1}" del módulo privado "{2}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método "{0}" de la interfaz exportada tiene o usa el nombre privado "{1}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Modifiers_cannot_appear_here_1184" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Modifiers cannot appear here.]]></Val>
@@ -5433,6 +5484,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La propiedad "{0}" no tiene inicializador y no está asignada de forma definitiva en el constructor.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5553,6 +5613,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La propiedad "{0}" se usa antes de asignarla.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5652,6 +5721,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método público "{0}" de la clase exportada tiene o usa el nombre "{1}" del módulo externo {2}, pero no puede tener nombre.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método público "{0}" de la clase exportada tiene o usa el nombre "{1}" del módulo privado "{2}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método público "{0}" de la clase exportada tiene o usa el nombre privado "{1}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -5679,6 +5775,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método estático público "{0}" de la clase exportada tiene o usa el nombre "{1}" del módulo externo {2}, pero no puede tener nombre.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método estático público "{0}" de la clase exportada tiene o usa el nombre "{1}" del módulo privado "{2}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[El método estático público "{0}" de la clase exportada tiene o usa el nombre privado "{1}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -6465,6 +6588,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Las declaraciones de propiedad siguientes deben tener el mismo tipo. La propiedad "{0}" tiene el tipo "{1}" en {2}, pero aquí tiene el tipo "{3}".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Subsequent_variable_declarations_must_have_the_same_type_Variable_0_has_type_1_at_2_but_here_has_typ_2403" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent variable declarations must have the same type.  Variable '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
@@ -6687,11 +6819,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary.]]></Val>
+          <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[El tipo inferido de '{0}' hace referencia a un tipo "this" no accesible. Se requiere una anotación de tipo.]]></Val>
+            <Val><![CDATA[El tipo inferido de "{0}" hace referencia a un tipo "{1}" no accesible. Se requiere una anotación de tipo.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8742,6 +8874,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Aquí no se permiten tipos "unique symbol".]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Los tipos "unique symbol" se permiten solo en variables en una instrucción de variable.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Los tipos "unique symbol" no se pueden utilizar en una declaración de variable con un nombre de enlace.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";with_statements_are_not_allowed_in_an_async_function_block_1300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['with' statements are not allowed in an async function block.]]></Val>
diff --git a/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 67025087ec8..b77e815dfd5 100644
--- a/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/fra/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -150,47 +150,47 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a class property declaration must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nom de propriété calculée dans une déclaration de propriété de classe doit faire directement référence à un symbole intégré.]]></Val>
+            <Val><![CDATA[Un nom de propriété calculée dans une déclaration de propriété de classe doit faire référence à une expression dont le type est un type littéral ou un type 'symbole unique'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a method overload must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nom de propriété calculée dans une surcharge de méthode doit faire directement référence à un symbole intégré.]]></Val>
+            <Val><![CDATA[Un nom de propriété calculée dans une surcharge de méthode doit faire référence à une expression dont le type est un type littéral ou un type 'symbole unique'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a type literal must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nom de propriété calculée dans un littéral de type doit faire directement référence à un symbole intégré.]]></Val>
+            <Val><![CDATA[Un nom de propriété calculée dans un littéral de type doit faire référence à une expression dont le type est un type littéral ou un type 'symbole unique'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an ambient context must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nom de propriété calculée dans un contexte ambiant doit faire directement référence à un symbole intégré.]]></Val>
+            <Val><![CDATA[Un nom de propriété calculée dans un contexte ambiant doit faire référence à une expression dont le type est un type littéral ou un type 'symbole unique'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an interface must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Un nom de propriété calculée dans une interface doit faire directement référence à un symbole intégré.]]></Val>
+            <Val><![CDATA[Un nom de propriété calculée dans une interface doit faire référence à une expression dont le type est un type littéral ou un type 'symbole unique'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -315,6 +315,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -528,6 +534,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Une propriété d'une classe dont le type est un type 'symbole unique' doit être à la fois 'static' et 'readonly'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Une propriété d'une interface ou d'un littéral de type dont le type est un type 'symbole unique' doit être 'readonly'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_required_parameter_cannot_follow_an_optional_parameter_1016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A required parameter cannot follow an optional parameter.]]></Val>
@@ -774,6 +798,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Une variable dont le type est un type 'symbole unique' doit être 'const'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_yield_expression_is_only_allowed_in_a_generator_body_1163" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A 'yield' expression is only allowed in a generator body.]]></Val>
@@ -2586,6 +2619,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Déclaration '{0}' dupliquée.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Duplicate_function_implementation_2393" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate function implementation.]]></Val>
@@ -2796,6 +2838,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Activez la vérification stricte de l'initialisation des propriétés dans les classes.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2934,11 +2985,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_0_arguments_but_got_a_minimum_of_1_2556" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[{0} arguments attendus, mais {1} reçus au minimum.]]></Val>
+            <Val><![CDATA[{0} arguments attendus, mais {1} ou plus reçus.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2970,11 +3021,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected at least {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Au moins {0} arguments attendus, mais {1} reçus au minimum.]]></Val>
+            <Val><![CDATA[Au moins {0} arguments attendus, mais {1} ou plus reçus.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4509,6 +4560,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode '{0}' de l'interface exportée comporte ou utilise le nom '{1}' du module privé '{2}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode '{0}' de l'interface exportée comporte ou utilise le nom privé '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Modifiers_cannot_appear_here_1184" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Modifiers cannot appear here.]]></Val>
@@ -5433,6 +5502,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La propriété '{0}' n'a aucun initialiseur et n'est pas définitivement assignée dans le constructeur.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5553,6 +5631,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La propriété '{0}' est utilisée avant d'être assignée.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5652,6 +5739,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode publique '{0}' de la classe exportée comporte ou utilise le nom '{1}' du module externe {2} mais ne peut pas être nommée.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode publique '{0}' de la classe exportée comporte ou utilise le nom '{1}' du module privé '{2}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode publique '{0}' de la classe exportée comporte ou utilise le nom privé '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -5679,6 +5793,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode statique publique '{0}' de la classe exportée comporte ou utilise le nom '{1}' du module externe {2} mais ne peut pas être nommée.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode statique publique '{0}' de la classe exportée comporte ou utilise le nom '{1}' du module privé '{2}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La méthode statique publique '{0}' de la classe exportée comporte ou utilise le nom privé '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -6465,6 +6606,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Les déclarations de propriétés ultérieures doivent avoir le même type. La propriété '{0}' a le type '{1}' au niveau de {2}, mais ici elle a le type '{3}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Subsequent_variable_declarations_must_have_the_same_type_Variable_0_has_type_1_at_2_but_here_has_typ_2403" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent variable declarations must have the same type.  Variable '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
@@ -6687,11 +6837,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary.]]></Val>
+          <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Le type déduit de '{0}' référence un type 'this' inaccessible. Une annotation de type est nécessaire.]]></Val>
+            <Val><![CDATA[Le type déduit de '{0}' référence un type '{1}' inaccessible. Une annotation de type est nécessaire.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8742,6 +8892,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Les types 'symbole unique' ne sont pas autorisés ici.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Les types 'symbole unique' sont uniquement autorisés sur les variables d'une déclaration de variable.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Les types 'symbole unique' ne peuvent pas être utilisés dans une déclaration de variable avec un nom de liaison.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";with_statements_are_not_allowed_in_an_async_function_block_1300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['with' statements are not allowed in an async function block.]]></Val>
diff --git a/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 3a589da079d..e204b688ed7 100644
--- a/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/ita/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -144,30 +144,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Un nome di proprietà calcolato in una dichiarazione di proprietà di classe deve fare riferimento a un'espressione il cui tipo è un tipo di valore letterale o un tipo 'unique symbol'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Un nome di proprietà calcolato in un overload di metodo deve fare riferimento a un'espressione il cui tipo è un tipo di valore letterale o un tipo 'unique symbol'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Un nome di proprietà calcolato in un valore letterale di tipo deve fare riferimento a un'espressione il cui tipo è un tipo di valore letterale o un tipo 'unique symbol'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Un nome di proprietà calcolato in un contesto di ambiente deve fare riferimento a un'espressione il cui tipo è un tipo di valore letterale o un tipo 'unique symbol'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Un nome di proprietà calcolato in un'interfaccia deve fare riferimento a un'espressione il cui tipo è un tipo di valore letterale o un tipo 'unique symbol'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -291,6 +306,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[In questo contesto non sono consentite asserzioni di assegnazione definite '!'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -507,12 +531,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una proprietà di una classe il cui tipo è un tipo 'unique symbol' deve essere sia 'static' che 'readonly'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una proprietà di un'interfaccia o di un valore letterale di tipo il cui tipo è un tipo 'unique symbol' deve essere 'readonly'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -765,6 +795,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Una variabile il cui tipo è un tipo 'unique symbol' deve essere 'const'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2583,6 +2616,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La dichiarazione '{0}' è duplicata.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2796,6 +2832,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Abilita il controllo tassativo dell'inizializzazione delle proprietà nelle classi.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2937,6 +2982,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sono previsti {0} argomenti, ma ne sono stati ottenuti più di {1}.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2970,6 +3018,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sono previsti almeno {0} argomenti, ma ne sono stati ottenuti più di {1}.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3717,32 +3768,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importare '{0}' da "{1}".]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importa '{0}' = obbligatorio ("{1}").]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importa * come '{0}' da "{1}".]]></Val>
+            <Val><![CDATA[Importa '{0}' dal modulo "{1}".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4506,12 +4536,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo '{0}' dell'interfaccia esportata ha o usa il nome '{1}' del modulo privato '{2}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo '{0}' dell'interfaccia esportata ha o usa il nome privato '{1}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5439,6 +5475,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La proprietà '{0}' non include alcun inizializzatore e non viene assolutamente assegnata nel costruttore.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5559,6 +5604,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[La proprietà '{0}' viene usata prima dell'assegnazione.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5661,18 +5715,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo pubblico '{0}' della classe esportata ha o usa il nome '{1}' del modulo esterno {2} ma non può essere rinominato.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo pubblico '{0}' della classe esportata ha o usa il nome '{1}' del modulo privato '{2}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo pubblico '{0}' della classe esportata ha o usa il nome privato '{1}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5706,18 +5769,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo statico pubblico '{0}' della classe esportata contiene o usa il nome '{1}' del modulo esterno {2} ma non può essere rinominato.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo statico pubblico '{0}' della classe esportata ha o usa il nome '{1}' del modulo privato '{2}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il metodo statico pubblico '{0}' della classe esportata ha o usa il nome privato '{1}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6510,6 +6582,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Le dichiarazioni di proprietà successive devono essere dello stesso tipo. La proprietà '{0}' è di tipo '{1}' alla posizione {2}, ma qui è di tipo '{3}'.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6738,6 +6813,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Il tipo dedotto di '{0}' fa riferimento a un tipo '{1}' non accessibile. È necessaria un'annotazione di tipo.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8790,18 +8868,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[I tipi 'unique symbol' non sono consentiti in questo punto.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[I tipi 'unique symbol' sono consentiti solo nelle variabili in un'istruzione di variabile.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Non è possibile usare i tipi 'unique symbol' in una dichiarazione di variabile con nome di binding.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 1034ed53292..861d10e5028 100644
--- a/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/jpn/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -144,30 +144,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[クラス プロパティ宣言内の計算されたプロパティ名は、型がリテラル型または '一意のシンボル' 型の式を参照する必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[メソッド オーバーロード内の計算されたプロパティ名は、型がリテラル型または '一意のシンボル' 型の式を参照する必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型リテラル内の計算されたプロパティ名は、型がリテラル型または '一意のシンボル' 型の式を参照する必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[環境コンテキスト内の計算されたプロパティ名は、型がリテラル型または '一意のシンボル' 型の式を参照する必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[インターフェイス内の計算されたプロパティ名は、型がリテラル型または '一意のシンボル' 型の式を参照する必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -291,6 +306,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[限定代入アサーション '!' は、このコンテキストで許可されていません。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -507,12 +531,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型が '一意のシンボル' 型のクラスのプロパティは、'static' と 'readonly' の両方である必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型が '一意のシンボル' 型のインターフェイスまたは型リテラルのプロパティは、'readonly' である必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -765,6 +795,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[型が '一意のシンボル' 型の変数は、'const' である必要があります。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2583,6 +2616,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[宣言 '{0}' が重複しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2796,6 +2832,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[クラス内のプロパティの初期化の厳密なチェックを有効にします。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2937,6 +2982,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[{0} 個の引数が必要ですが、{1} 個以上指定されました。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2970,6 +3018,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[最低でも {0} 個の引数が必要ですが、{1} 個以上指定されました。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3717,32 +3768,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA["{1}" から '{0}' をインポートします。]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Import '{0}' = require("{1}")。]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Import * as '{0}' from "{1}"。]]></Val>
+            <Val><![CDATA[モジュール "{1}" から '{0}' をインポートします。]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4506,12 +4536,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたインターフェイスのメソッド '{0}' が、プライベート モジュール '{2}' の名前 '{1}' を使用しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたインターフェイスのメソッド '{0}' がプライベート名 '{1}' を使用しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5439,6 +5475,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロパティ '{0}' に初期化子がなく、コンストラクターで明確に割り当てられていません。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5559,6 +5604,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[プロパティ '{0}' は割り当てられる前に使用されています。]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5661,18 +5715,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたクラスのパブリック メソッド '{0}' が外部モジュール {2} の名前 '{1}' を使用していますが、名前を指定することはできません。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたクラスのパブリック メソッド '{0}' が、プライベート モジュール '{2}' の名前 '{1}' を使用しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたクラスのパブリック メソッド '{0}' がプライベート名 '{1}' を使用しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5706,18 +5769,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたクラスのパブリック静的メソッド '{0}' が外部モジュール {2} の名前 '{1}' を使用していますが、名前を指定することはできません。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたクラスのパブリック静的メソッド '{0}' が、プライベート モジュール '{2}' の名前 '{1}' を使用しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[エクスポートされたクラスのパブリック静的メソッド '{0}' が、プライベート名 '{1}' を使用しています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6510,6 +6582,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[後続のプロパティ宣言は同じ型でなければなりません。プロパティ '{0}' の型は {2} では '{1}' ですが、ここでは型が '{3}' になっています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6738,6 +6813,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' の推定型はアクセス不可能な '{1}' 型を参照します。型の注釈が必要です。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8790,18 +8868,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['一意のシンボル' 型はここでは許可されていません。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['一意のシンボル' 型は変数ステートメントの変数でのみ許可されています。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['一意のシンボル' 型は、バインディング名を持つ変数の宣言では使用できません。]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
index e1edb303ec2..9c099aeb990 100644
--- a/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -144,30 +144,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[클래스 속성 선언의 계산된 속성 이름은 형식이 리터럴 형식이거나 '고유 기호' 형식인 식을 참조해야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[메서드 오버로드의 계산된 속성 이름은 형식이 리터럴 형식이거나 '고유 기호' 형식인 식을 참조해야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[리터럴 형식의 계산된 속성 이름은 형식이 리터럴 형식이거나 '고유 기호' 형식인 식을 참조해야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[앰비언트 컨텍스트의 계산된 속성 이름은 형식이 리터럴 형식이거나 '고유 기호' 형식인 식을 참조해야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[인터페이스의 계산된 속성 이름은 형식이 리터럴 형식이거나 '고유 기호' 형식인 식을 참조해야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -291,6 +306,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[이 컨텍스트에서는 한정된 할당 어설션 '!'가 허용되지 않습니다.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -507,12 +531,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[형식이 '고유 기호' 형식인 클래스의 속성은 'static'과 'readonly' 둘 다여야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[형식이 '고유 기호' 형식인 인터페이스 또는 형식 리터럴의 속성은 'readonly'여야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -765,6 +795,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[형식이 '고유한 기호' 형식인 변수는 'const'여야 합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2583,6 +2616,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 선언이 중복되었습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2796,6 +2832,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[클래스의 속성 초기화에 대해 엄격한 검사를 사용합니다.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2937,6 +2982,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[{0}개의 인수가 필요한데 {1}개 이상을 가져왔습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2970,6 +3018,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[최소 {0}개의 인수가 필요한데 {1}개 이상을 가져왔습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3717,32 +3768,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA["{1}"에서 '{0}'을(를) 가져옵니다.]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA['{0}' 가져오기 = 필수입니다("{1}").]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA["{1}"에서 '{0}'(으)로서 *를 가져옵니다.]]></Val>
+            <Val><![CDATA["{1}" 모듈에서 '{0}'을(를) 가져옵니다.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4506,12 +4536,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 인터페이스의 '{0}' 메서드가 전용 모듈 '{2}'의 '{1}' 이름을 가지고 있거나 사용 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 인터페이스의 '{0}' 메서드가 전용 이름 '{1}'을(를) 가지고 있거나 사용 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5439,6 +5475,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[속성 '{0}'은(는) 이니셜라이저가 없고 생성자에 할당되어 있지 않습니다.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5473,7 +5518,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' is declared but its value is never read.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[속성 '{0}'이(가) 선언되었지만 해당 값은 읽히지 않습니다.]]></Val>
+            <Val><![CDATA[속성 '{0}'이(가) 선언은 되었지만 해당 값이 읽히지는 않았습니다.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -5559,6 +5604,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' 속성이 할당되기 전에 사용되었습니다.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5661,18 +5715,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 클래스의 공용 메서드 '{0}'이(가) 외부 모듈 {2}의 '{1}' 이름을 가지고 있거나 사용 중이지만 명명할 수 없습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 클래스의 공용 메서드 '{0}'이(가) 전용 모듈 '{2}'의 '{1}' 이름을 가지고 있거나 사용 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 클래스의 공용 메서드의 '{0}'이(가) 전용 이름 '{1}'을(를) 가지고 있거나 사용 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5706,18 +5769,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 클래스의 공용 정적 메서드 '{0}'이(가) 외부 모듈 {2}의 '{1}' 이름을 가지고 있거나 사용 중이지만 명명할 수 없습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 클래스에 있는 공용 정적 메서드 '{0}'이(가) 전용 모듈 '{2}'의 '{1}' 이름을 가지고 있거나 사용 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[내보낸 클래스의 공용 정적 메서드 '{0}'이(가) 전용 이름 '{1}'을(를) 가지고 있거나 사용 중입니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6510,6 +6582,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[후속 속성 선언에 같은 형식이 있어야 합니다. '{0}' 속성이 {2}에서 '{1}' 형식이어야 하는데 여기에는 '{3}' 형식이 있습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6738,6 +6813,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}'의 유추 형식이 액세스할 수 없는 '{1}' 형식을 참조합니다. 형식 주석이 필요합니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8017,7 +8095,7 @@
         <Str Cat="Text">
           <Val><![CDATA['{0}' is declared but its value is never read.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA['{0}'이(가) 선언되었지만 해당 값은 읽히지 않습니다.]]></Val>
+            <Val><![CDATA['{0}'이(가) 선언은 되었지만 해당 값이 읽히지는 않았습니다.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8790,18 +8868,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[여기에서 '고유 기호' 형식은 허용되지 않습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['고유 기호' 형식은 변수 문의 변수에만 허용됩니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['고유 기호' 형식은 바인딩 이름과 함께 변수 선언에 사용할 수 없습니다.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 2524f29e99e..be3889c2dd4 100644
--- a/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/plk/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -111,7 +111,7 @@
         <Str Cat="Text">
           <Val><![CDATA[A class member cannot have the '{0}' keyword.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Element członkowski klasy nie może zawierać słowa kluczowego „{0}”.]]></Val>
+            <Val><![CDATA[Składowa klasy nie może zawierać słowa kluczowego „{0}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -137,30 +137,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nazwa właściwości obliczanej w deklaracji właściwości klasy musi odwoływać się do wyrażenia, którego typem jest typ literału lub typ „unikatowy symbol”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nazwa właściwości obliczanej w przeciążeniu metody musi odwoływać się do wyrażenia, którego typem jest typ literału lub typ „unikatowy symbol”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nazwa właściwości obliczanej w typie literału musi odwoływać się do wyrażenia, którego typem jest typ literału lub typ „unikatowy symbol”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nazwa właściwości obliczanej w otaczającym kontekście musi odwoływać się do wyrażenia, którego typem jest typ literału lub typ „unikatowy symbol”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Nazwa właściwości obliczanej w interfejsie musi odwoływać się do wyrażenia, którego typem jest typ literału lub typ „unikatowy symbol”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -186,7 +201,7 @@
         <Str Cat="Text">
           <Val><![CDATA[A const enum member can only be accessed using a string literal.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Dostęp do elementu członkowskiego wyliczenia ze specyfikatorem const można uzyskać tylko za pomocą literału ciągu.]]></Val>
+            <Val><![CDATA[Dostęp do składowej wyliczenia ze specyfikatorem const można uzyskać tylko za pomocą literału ciągu.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -284,6 +299,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -387,7 +408,7 @@
         <Str Cat="Text">
           <Val><![CDATA[A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Inicjator elementu członkowskiego w deklaracji wyliczenia nie może przywoływać elementów członkowskich zadeklarowanych po nim, w tym elementów członkowskich zdefiniowanych w innych wyliczeniach.]]></Val>
+            <Val><![CDATA[Inicjator składowej w deklaracji wyliczenia nie może przywoływać składowych zadeklarowanych po nim, w tym składowych zdefiniowanych w innych wyliczeniach.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -500,12 +521,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Właściwość klasy, której typem jest typ „unikatowy symbol”, musi być „static” i „readonly”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Właściwość interfejsu lub typu, którego typem jest typ „unikatowy symbol”, musi być „readonly”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -675,7 +702,7 @@
         <Str Cat="Text">
           <Val><![CDATA[A 'this' type is available only in a non-static member of a class or interface.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Typ „this” jest dostępny tylko w niestatycznym elemencie członkowskim klasy lub interfejsu.]]></Val>
+            <Val><![CDATA[Typ „this” jest dostępny tylko w niestatycznej składowej klasy lub interfejsu.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -755,6 +782,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Zmienna, której typem jest typ „unikatowy symbol”, musi być „const”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -1053,7 +1083,7 @@
         <Str Cat="Text">
           <Val><![CDATA[An enum member cannot have a numeric name.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Element członkowski wyliczenia nie może mieć nazwy liczbowej.]]></Val>
+            <Val><![CDATA[Składowa wyliczenia nie może mieć nazwy liczbowej.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1305,7 +1335,7 @@
         <Str Cat="Text">
           <Val><![CDATA[An object member cannot be declared optional.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Element członkowski obiektu nie może być zadeklarowany jako opcjonalny.]]></Val>
+            <Val><![CDATA[Składowa obiektu nie może być zadeklarowana jako opcjonalna.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1425,7 +1455,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Base class expressions cannot reference class type parameters.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Wyrażenia klasy podstawowej nie mogą odwoływać się do parametrów typu klasy.]]></Val>
+            <Val><![CDATA[Wyrażenia klasy bazowej nie mogą odwoływać się do parametrów typu klasy.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1434,7 +1464,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Base constructor return type '{0}' is not a class or interface type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Zwracany typ konstruktora podstawowego „{0}” nie jest typem klasy ani interfejsu.]]></Val>
+            <Val><![CDATA[Zwracany typ konstruktora bazowego „{0}” nie jest typem klasy ani interfejsu.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1698,7 +1728,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Nie można znaleźć nazwy „{0}”. Czy chodziło o element członkowski wystąpienia „this.{0}”?]]></Val>
+            <Val><![CDATA[Nie można znaleźć nazwy „{0}”. Czy chodziło o składową wystąpienia „this.{0}”?]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1707,7 +1737,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Nie można znaleźć nazwy „{0}”. Czy chodziło o statyczny element członkowski „{1}.{0}”?]]></Val>
+            <Val><![CDATA[Nie można znaleźć nazwy „{0}”. Czy chodziło o statyczną składową „{1}.{0}”?]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1968,7 +1998,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Klasa „{0}” definiuje metodę dostępu do elementu członkowskiego wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako funkcję elementu członkowskiego wystąpienia.]]></Val>
+            <Val><![CDATA[Klasa „{0}” definiuje metodę dostępu do składowej wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako funkcję składową wystąpienia.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1977,7 +2007,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Klasa „{0}” definiuje funkcję elementu członkowskiego wystąpienia „{1}”,ale rozszerzona klasa „{2}” definiuje ją jako metodę dostępu do elementu członkowskiego wystąpienia.]]></Val>
+            <Val><![CDATA[Klasa „{0}” definiuje funkcję składową wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako metodę dostępu do składowej wystąpienia.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1986,7 +2016,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Klasa „{0}” definiuje funkcję elementu członkowskiego wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako właściwość elementu członkowskiego wystąpienia.]]></Val>
+            <Val><![CDATA[Klasa „{0}” definiuje funkcję składową wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako właściwość składowej wystąpienia.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -1995,7 +2025,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Klasa „{0}” definiuje właściwość elementu członkowskiego wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako funkcję elementu członkowskiego wystąpienia.]]></Val>
+            <Val><![CDATA[Klasa „{0}” definiuje właściwość składowej wystąpienia „{1}”, ale rozszerzona klasa „{2}” definiuje ją jako funkcję składową wystąpienia.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2004,7 +2034,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Class '{0}' incorrectly extends base class '{1}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Klasa „{0}” niepoprawnie rozszerza klasę podstawową „{1}”.]]></Val>
+            <Val><![CDATA[Klasa „{0}” niepoprawnie rozszerza klasę bazową „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2052,7 +2082,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Class static side '{0}' incorrectly extends base class static side '{1}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Strona statyczna klasy „{0}” niepoprawnie rozszerza stronę statyczną klasy podstawowej „{1}”.]]></Val>
+            <Val><![CDATA[Strona statyczna klasy „{0}” niepoprawnie rozszerza stronę statyczną klasy bazowej „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2133,7 +2163,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Computed values are not permitted in an enum with string valued members.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Obliczone wartości nie są dozwolone w wyliczeniu z elementami członkowskimi o wartości ciągu.]]></Val>
+            <Val><![CDATA[Obliczone wartości nie są dozwolone w wyliczeniu ze składowymi o wartości ciągu.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2567,6 +2597,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Zduplikowana deklaracja „{0}”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2637,7 +2670,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Zduplikowany identyfikator „_super”. Kompilator używa ciągu „_super” do przechwycenia odwołania do klasy podstawowej.]]></Val>
+            <Val><![CDATA[Zduplikowany identyfikator „_super”. Kompilator używa ciągu „_super” do przechwycenia odwołania do klasy bazowej.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2780,6 +2813,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Włącz dokładne sprawdzanie inicjowania właściwości w klasach.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2847,7 +2889,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Enum member expected.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Oczekiwano elementu członkowskiego wyliczenia.]]></Val>
+            <Val><![CDATA[Oczekiwano składowych wyliczenia.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2856,7 +2898,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Enum member must have initializer.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Element członkowski wyliczenia musi mieć inicjator.]]></Val>
+            <Val><![CDATA[Składowa wyliczenia musi mieć inicjator.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2877,7 +2919,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Enum type '{0}' has members with initializers that are not literals.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Typ wyliczania „{0}” zawiera elementy z inicjatorami niebędącymi literałami.]]></Val>
+            <Val><![CDATA[Typ wyliczenia „{0}” ma składowe z inicjatorami niebędącymi literałami.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2921,6 +2963,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Oczekiwano {0} argumentów, ale otrzymano {1} lub więcej.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2954,6 +2999,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Oczekiwano co najmniej {0} argumentów, ale otrzymano {1} lub więcej.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -3135,7 +3183,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Expression resolves to '_super' that compiler uses to capture base class reference.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Wynikiem rozpoznania wyrażenia jest element „_super” używany przez kompilator do przechwycenia odwołania do klasy podstawowej.]]></Val>
+            <Val><![CDATA[Wynikiem rozpoznania wyrażenia jest element „_super” używany przez kompilator do przechwycenia odwołania do klasy bazowej.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -3810,7 +3858,7 @@
         <Str Cat="Text">
           <Val><![CDATA[In ambient enum declarations member initializer must be constant expression.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[W deklaracjach wyliczenia otoczenia inicjator elementu członkowskiego musi być wyrażeniem stałym.]]></Val>
+            <Val><![CDATA[W deklaracjach wyliczenia otoczenia inicjator składowej musi być wyrażeniem stałym.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -3828,7 +3876,7 @@
         <Str Cat="Text">
           <Val><![CDATA[In 'const' enum declarations member initializer must be constant expression.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[W deklaracjach wyliczeń ze specyfikatorem „const” inicjator elementu członkowskiego musi być wyrażeniem stałym.]]></Val>
+            <Val><![CDATA[W deklaracjach wyliczeń ze specyfikatorem „const” inicjator składowej musi być wyrażeniem stałym.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -3909,7 +3957,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Inicjator zmiennej elementu członkowskiego wystąpienia „{0}” nie może przywoływać identyfikatora „{1}” zadeklarowanego w konstruktorze.]]></Val>
+            <Val><![CDATA[Inicjator zmiennej składowej wystąpienia „{0}” nie może przywoływać identyfikatora „{1}” zadeklarowanego w konstruktorze.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4128,7 +4176,7 @@
         <Str Cat="Text">
           <Val><![CDATA[JSDoc '@typedef' tag should either have a type annotation or be followed by '@property' or '@member' tags.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Tag JSDoc „@typedef” powinien mieć adnotację typu albo powinien następować po nim tag „@property” lub „@member”.]]></Val>
+            <Val><![CDATA[Tag „@typedef” JSDoc powinien mieć adnotację typu lub powinien po nim następować tag „@property” lub „@member”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4443,7 +4491,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Member '{0}' implicitly has an '{1}' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Dla elementu członkowskiego „{0}” niejawnie określono typ „{1}”.]]></Val>
+            <Val><![CDATA[Dla składowej „{0}” niejawnie określono typ „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4487,12 +4535,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda „{0}” wyeksportowanego interfejsu ma nazwę „{1}” z modułu prywatnego „{2}” lub używa tej nazwy.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda „{0}” wyeksportowanego interfejsu ma nazwę prywatną „{1}” lub używa tej nazwy.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -4509,7 +4563,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Moduł {0} już wyeksportował element członkowski o nazwie „{1}”. Zastanów się nad jawnym ponownym eksportem, aby rozstrzygnąć niejednoznaczność.]]></Val>
+            <Val><![CDATA[Moduł {0} już wyeksportował składową o nazwie „{1}”. Zastanów się nad jawnym ponownym eksportem, aby rozstrzygnąć niejednoznaczność.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4527,7 +4581,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Module '{0}' has no exported member '{1}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Moduł „{0}” nie ma wyeksportowanego elementu członkowskiego „{1}”.]]></Val>
+            <Val><![CDATA[Moduł „{0}” nie ma wyeksportowanej składowej „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4677,7 +4731,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Namespace '{0}' has no exported member '{1}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Przestrzeń nazw „{0}” nie ma wyeksportowanego elementu członkowskiego „{1}”.]]></Val>
+            <Val><![CDATA[Przestrzeń nazw „{0}” nie ma wyeksportowanej składowej „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4704,7 +4758,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Klasa nieabstrakcyjna „{0}” nie implementuje odziedziczonego abstrakcyjnego elementu członkowskiego „{1}” z klasy „{2}”.]]></Val>
+            <Val><![CDATA[Klasa nieabstrakcyjna „{0}” nie implementuje odziedziczonej abstrakcyjnej składowej „{1}” z klasy „{2}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4713,7 +4767,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Wyrażenie klasy nieabstrakcyjnej nie implementuje odziedziczonego abstrakcyjnego elementu członkowskiego „{0}” z klasy „{1}”.]]></Val>
+            <Val><![CDATA[Wyrażenie klasy nieabstrakcyjnej nie implementuje odziedziczonej abstrakcyjnej składowej „{0}” z klasy „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4812,7 +4866,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Octal literals are not allowed in enums members initializer. Use the syntax '{0}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Literały ósemkowe są niedozwolone w inicjatorze elementów czlonkowskich wyliczeń. Użyj składni „{0}”.]]></Val>
+            <Val><![CDATA[Literały ósemkowe są niedozwolone w inicjatorze składowych wyliczeń. Użyj składni „{0}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4896,7 +4950,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Only public and protected methods of the base class are accessible via the 'super' keyword.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Tylko publiczne i chronione metody klasy podstawowej są dostępne przy użyciu słowa kluczowego „super”.]]></Val>
+            <Val><![CDATA[Tylko publiczne i chronione metody klasy bazowej są dostępne przy użyciu słowa kluczowego „super”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -5417,6 +5471,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Właściwość „{0}” nie ma inicjatora i nie jest na pewno przypisana w konstruktorze.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5537,6 +5600,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Właściwość „{0}” jest używana przed przypisaniem.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5639,18 +5711,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda publiczna „{0}” wyeksportowanej klasy ma nazwę „{1}” z modułu zewnętrznego {2} lub używa tej nazwy, ale nie można jej nazwać.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda publiczna „{0}” wyeksportowanej klasy ma nazwę „{1}” z modułu prywatnego „{2}” lub używa tej nazwy.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Metoda publiczna „{0}” wyeksportowanej klasy ma nazwę prywatną „{1}” lub używa tej nazwy.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5684,18 +5765,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Publiczna metoda statyczna „{0}” wyeksportowanej klasy ma nazwę „{1}” z modułu zewnętrznego {2} lub używa tej nazwy, ale nie można jej nazwać.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Publiczna metoda statyczna „{0}” wyeksportowanej klasy ma nazwę „{1}” z modułu prywatnego „{2}” lub używa tej nazwy.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Publiczna metoda statyczna „{0}” wyeksportowanej klasy ma nazwę prywatną „{1}” lub używa tej nazwy.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6426,7 +6516,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Static members cannot reference class type parameters.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Statyczne elementy członkowskie nie mogą przywoływać parametrów typu klasy.]]></Val>
+            <Val><![CDATA[Statyczne składowe nie mogą przywoływać parametrów typu klasy.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -6482,6 +6572,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Kolejne deklaracje właściwości muszą być tego samego typu. Właściwość „{0}” jest typu „{1}” w {2} , ale w tym miejscu jest typu „{3}”.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6710,6 +6803,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Wnioskowany typ „{0}” przywołuje niedostępny typ „{1}”. Adnotacja typu jest konieczna.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6882,7 +6978,7 @@
         <Str Cat="Text">
           <Val><![CDATA[The return type of an async function must either be a valid promise or must not contain a callable 'then' member.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Zwracany typ funkcji asynchronicznej musi być prawidłową obietnicą lub nie może zawierać wywoływalnego elementu członkowskiego „then”.]]></Val>
+            <Val><![CDATA[Zwracany typ funkcji asynchronicznej musi być prawidłową obietnicą lub nie może zawierać wywoływalnej składowej „then”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -7050,7 +7146,7 @@
         <Str Cat="Text">
           <Val><![CDATA[This syntax requires an imported helper named '{1}', but module '{0}' has no exported member '{1}'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Ta składnia wymaga zaimportowanego pomocnika o nazwie „{1}”, ale moduł „{0}” nie ma wyeksportowanego elementu członkowskiego „{1}”.]]></Val>
+            <Val><![CDATA[Ta składnia wymaga zaimportowanego pomocnika o nazwie „{1}”, ale moduł „{0}” nie ma wyeksportowanej składowej „{1}”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -7401,7 +7497,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Type of 'await' operand must either be a valid promise or must not contain a callable 'then' member.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Typ operandu „await” musi być prawidłową obietnicą lub nie może zawierać wywoływalnego elementu członkowskiego „then”.]]></Val>
+            <Val><![CDATA[Typ operandu „await” musi być prawidłową obietnicą lub nie może zawierać wywoływalnej składowej „then”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -7410,7 +7506,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Type of iterated elements of a 'yield*' operand must either be a valid promise or must not contain a callable 'then' member.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Typ iterowanych elementów operandu „yield*” musi być prawidłową obietnicą lub nie może zawierać wywoływalnego elementu członkowskiego „then”.]]></Val>
+            <Val><![CDATA[Typ iterowanych elementów operandu „yield*” musi być prawidłową obietnicą lub nie może zawierać wywoływalnej składowej „then”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -7419,7 +7515,7 @@
         <Str Cat="Text">
           <Val><![CDATA[Type of 'yield' operand in an async generator must either be a valid promise or must not contain a callable 'then' member.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Typ operandu „yield” w generatorze asynchronicznym musi być prawidłową obietnicą lub nie może zawierać wywoływalnego elementu członkowskiego „then”.]]></Val>
+            <Val><![CDATA[Typ operandu „yield” w generatorze asynchronicznym musi być prawidłową obietnicą lub nie może zawierać wywoływalnej składowej „then”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8088,7 +8184,7 @@
         <Str Cat="Text">
           <Val><![CDATA['{0}' modifier cannot appear on a type member.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Modyfikator „{0}” nie może być stosowany w przypadku elementu członkowskiego typu.]]></Val>
+            <Val><![CDATA[Modyfikator „{0}” nie może być stosowany w przypadku składowej typu.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8292,7 +8388,7 @@
         <Str Cat="Text">
           <Val><![CDATA['const' enum member initializer was evaluated to a non-finite value.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Wynikiem obliczenia inicjatora elementu członkowskiego wyliczenia ze specyfikatorem „const” jest wartość nieskończona.]]></Val>
+            <Val><![CDATA[Wynikiem obliczenia inicjatora składowej wyliczenia ze specyfikatorem „const” jest wartość nieskończona.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8301,7 +8397,7 @@
         <Str Cat="Text">
           <Val><![CDATA['const' enum member initializer was evaluated to disallowed value 'NaN'.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Wynikiem obliczenia inicjatora elementu członkowskiego wyliczenia ze specyfikatorem „const” jest niedozwolona wartość „NaN”.]]></Val>
+            <Val><![CDATA[Wynikiem obliczenia inicjatora składowej wyliczenia ze specyfikatorem „const” jest niedozwolona wartość „NaN”.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8592,7 +8688,7 @@
         <Str Cat="Text">
           <Val><![CDATA['super' can only be referenced in members of derived classes or object literal expressions.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Element „super” może być przywoływany jedynie w elementach członkowskich klas pochodnych lub wyrażeń literałów obiektów.]]></Val>
+            <Val><![CDATA[Element „super” może być przywoływany jedynie w składowych klas pochodnych lub wyrażeń literałów obiektów.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8619,7 +8715,7 @@
         <Str Cat="Text">
           <Val><![CDATA['super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Element „super” jest dozwolony w elementach członkowskich wyrażeń literałów obiektów tylko wtedy, gdy opcja „target” ma wartość „ES2015” lub wyższą.]]></Val>
+            <Val><![CDATA[Element „super” jest dozwolony w składowych wyrażeń literałów obiektów tylko wtedy, gdy opcja „target” ma wartość „ES2015” lub wyższą.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8646,7 +8742,7 @@
         <Str Cat="Text">
           <Val><![CDATA['super' must be followed by an argument list or member access.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Po elemencie „super” musi występować lista argumentów lub metoda dostępu do elementu członkowskiego.]]></Val>
+            <Val><![CDATA[Po elemencie „super” musi występować lista argumentów lub metoda dostępu do składowej.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8655,7 +8751,7 @@
         <Str Cat="Text">
           <Val><![CDATA['super' property access is permitted only in a constructor, member function, or member accessor of a derived class.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Dostęp do właściwości „super” jest dozwolony tylko w konstruktorze, funkcji członkowskiej lub metodzie dostępu elementu członkowskiego klasy pochodnej.]]></Val>
+            <Val><![CDATA[Dostęp do właściwości „super” jest dozwolony tylko w konstruktorze, funkcji składowej lub metodzie dostępu składowej klasy pochodnej.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8762,18 +8858,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Typy „unikatowy symbol” nie są dozwolone w tym miejscu.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Typy „unikatowy symbol” są dozwolone tylko w zmiennych w instrukcji zmiennej.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Typów „unikatowy symbol” nie można używać w deklaracji zmiennej z nazwą powiązania.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
index c8ff92b6a88..38902fa6734 100644
--- a/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/ptb/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -134,47 +134,47 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a class property declaration must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Um nome de propriedade calculado em uma declaração de propriedade de classe deve se referir diretamente a um símbolo interno.]]></Val>
+            <Val><![CDATA[Um nome de propriedade computado em uma declaração de propriedade de classe deve se referir a uma expressão cujo tipo é um tipo literal ou um 'símbolo exclusivo'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a method overload must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Um nome de propriedade calculado em uma sobrecarga de método deve se referir diretamente a um símbolo interno.]]></Val>
+            <Val><![CDATA[Um nome de propriedade computado em uma sobrecarga do método deve se referir a uma expressão cujo tipo é um tipo literal ou um 'símbolo exclusivo'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in a type literal must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Um nome de propriedade calculado em um literal de tipo deve se referir diretamente a um símbolo interno.]]></Val>
+            <Val><![CDATA[Um nome de propriedade computado em um tipo literal deve se referir a uma expressão cujo tipo é um tipo literal ou um 'símbolo exclusivo'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an ambient context must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Um nome de propriedade calculado em um contexto de ambiente deve se referir diretamente a um símbolo interno.]]></Val>
+            <Val><![CDATA[Um nome de propriedade computado em um contexto de ambiente deve se referir a uma expressão cujo tipo é um tipo literal ou um 'símbolo exclusivo'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[A computed property name in an interface must directly refer to a built-in symbol.]]></Val>
+          <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Um nome de propriedade calculado em uma interface deve se referir diretamente a um símbolo interno.]]></Val>
+            <Val><![CDATA[Um nome de propriedade computado em uma interface deve se referir a uma expressão cujo tipo é um tipo literal ou um 'símbolo exclusivo'.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -299,6 +299,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Uma declaração de atribuição definitiva '!' não é permitida neste contexto.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -512,6 +521,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Uma propriedade de uma classe cujo tipo é um tipo de 'símbolo exclusivo' deve ser 'estática' e 'somente leitura'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Uma propriedade de uma interface ou tipo literal cujo tipo é um tipo de 'símbolo exclusivo' deve ser 'somente leitura'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_required_parameter_cannot_follow_an_optional_parameter_1016" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A required parameter cannot follow an optional parameter.]]></Val>
@@ -755,6 +782,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Uma variável cujo tipo é um tipo de 'símbolo exclusivo' deve ser 'const'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_yield_expression_is_only_allowed_in_a_generator_body_1163" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A 'yield' expression is only allowed in a generator body.]]></Val>
@@ -2561,6 +2597,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Declaração duplicada '{0}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Duplicate_function_implementation_2393" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate function implementation.]]></Val>
@@ -2771,6 +2816,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Habilite a verificação estrita de inicialização de propriedade nas classes.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2909,11 +2963,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_0_arguments_but_got_a_minimum_of_1_2556" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[{0} argumentos eram esperados, mas o mínimo de {1} foi obtido.]]></Val>
+            <Val><![CDATA[Eram {0} argumentos esperados, mas {1} ou mais foram obtidos.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -2945,11 +2999,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Expected_at_least_0_arguments_but_got_a_minimum_of_1_2557" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Expected at least {0} arguments, but got a minimum of {1}.]]></Val>
+          <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Pelo menos {0} argumentos eram esperados, mas um mínimo de {1} foi obtido.]]></Val>
+            <Val><![CDATA[Pelo menos {0} argumentos eram esperados, mas {1} ou mais foram obtidos.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -3695,32 +3749,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";Import_0_from_1_90013" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";Import_0_from_module_1_90013" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' from "{1}".]]></Val>
+          <Val><![CDATA[Import '{0}' from module "{1}".]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importar "{0}" de "{1}".]]></Val>
-          </Tgt>
-          <Prev Cat="Text">
-            <Val><![CDATA[Import {0} from {1}.]]></Val>
-          </Prev>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_0_require_1_95015" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import '{0}' = require("{1}").]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importar '{0}' = exigir ("{1}").]]></Val>
-          </Tgt>
-        </Str>
-        <Disp Icon="Str" />
-      </Item>
-      <Item ItemId=";Import_Asterisk_as_0_from_1_95016" ItemType="0" PsrId="306" Leaf="true">
-        <Str Cat="Text">
-          <Val><![CDATA[Import * as '{0}' from "{1}".]]></Val>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Importar * como '{0}' de "{1}".]]></Val>
+            <Val><![CDATA[Importar '{0}' do módulo "{1}".]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -4481,6 +4514,24 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método '{0}' da interface exportada tem ou está usando o nome '{1}' do módulo privado '{2}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método '{0}' da interface exportada tem ou está usando o nome privado '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Modifiers_cannot_appear_here_1184" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Modifiers cannot appear here.]]></Val>
@@ -5402,6 +5453,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[A propriedade '{0}' não tem nenhum inicializador e não está definitivamente atribuída no construtor.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5522,6 +5582,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[A propriedade '{0}' é usada antes de ser atribuída.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5621,6 +5690,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método público '{0}' da classe exportada tem ou está usando o nome '{1}' do módulo externo {2}, mas não pode ser nomeado.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método público '{0}' da classe exportada tem ou está usando o nome '{1}' do módulo privado '{2}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método público '{0}' da classe exportada tem ou está usando o nome privado '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -5648,6 +5744,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método estático público '{0}' da classe exportada tem ou está usando o nome '{1}' do módulo externo {2}, mas não pode ser nomeado.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método estático público '{0}' da classe exportada tem ou está usando o nome '{1}' do módulo privado '{2}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[O método estático público '{0}' da classe exportada tem ou está usando o nome privado '{1}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
@@ -6428,6 +6551,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Declarações de propriedade subsequentes devem ter o mesmo tipo. A propriedade '{0}' tem o tipo '{1}' em {2}, mas aqui tem o tipo '{3}'.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Subsequent_variable_declarations_must_have_the_same_type_Variable_0_has_type_1_at_2_but_here_has_typ_2403" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent variable declarations must have the same type.  Variable '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
@@ -6650,11 +6782,11 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
-      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
+      <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
-          <Val><![CDATA[The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary.]]></Val>
+          <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
           <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[O tipo inferido de '{0}' referencia um tipo 'this' inacessível. Uma anotação de tipo é necessária.]]></Val>
+            <Val><![CDATA[O tipo inferido de '{0}' faz referência a um tipo '{1}' inacessível. Uma anotação de tipo é necessária.]]></Val>
           </Tgt>
         </Str>
         <Disp Icon="Str" />
@@ -8705,6 +8837,33 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[tipos de 'símbolo exclusivo' não são permitidos aqui.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[tipos de 'símbolo exclusivo' são permitidos apenas em variáveis em uma declaração de variável.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
+      <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[tipos de 'símbolo exclusivo' não podem ser usados em uma declaração de variável com um nome associado.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";with_statements_are_not_allowed_in_an_async_function_block_1300" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['with' statements are not allowed in an async function block.]]></Val>
diff --git a/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
index ff50a731206..543639d56e9 100644
--- a/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/rus/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -143,30 +143,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Имя вычисляемого свойства в объявлении свойств класса должно ссылаться на выражение, тип которого — литерал или уникальный символ.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Имя вычисляемого свойства в перегрузке метода должно ссылаться на выражение, тип которого — литерал или уникальный символ.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Имя вычисляемого свойства в литерале должно ссылаться на выражение, тип которого — литерал или уникальный символ.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Имя вычисляемого свойства в окружающем контексте должно ссылаться на выражение, тип которого — литерал или уникальный символ.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Имя вычисляемого свойства в интерфейсе должно ссылаться на выражение, тип которого — литерал или уникальный символ.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -290,6 +305,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -506,12 +527,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Свойство класса, тип которого — уникальный символ, должно быть задано как "static" и "readonly".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Свойство интерфейса или литерала, тип которого — уникальный символ, должно быть задано как "readonly".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -764,6 +791,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Переменная типа "уникальный символ" должна быть задана как "const".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2582,6 +2612,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Дублирующееся объявление "{0}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2795,6 +2828,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Включение строгой проверки инициализации свойств в классах.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2936,6 +2978,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ожидалось аргументов: {0}, получено: {1} или больше.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2969,6 +3014,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Ожидалось аргументов не меньше: {0}, получено: {1} или больше.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -4505,12 +4553,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Метод "{0}" экспортированного интерфейса имеет или использует имя "{1}" из закрытого модуля "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Метод "{0}" экспортированного интерфейса имеет или использует закрытое имя "{1}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5438,6 +5492,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Свойство "{0}" не имеет инициализатора, и ему не гарантировано присваивание в конструкторе.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5558,6 +5621,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Свойство "{0}" используется перед присваиванием значения.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5660,18 +5732,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Открытый метод "{0}" экспортированного класса имеет или использует имя "{1}" из внешнего модуля {2}, но не может быть именован.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Открытый метод "{0}" экспортированного класса имеет или использует имя "{1}" из закрытого модуля "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Открытый метод "{0}" экспортированного класса имеет или использует закрытое имя "{1}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5705,18 +5786,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Открытый статический метод "{0}" экспортированного класса имеет или использует имя "{1}" из внешнего модуля {2}, но не может быть именован.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Открытый статический метод "{0}" экспортированного класса имеет или использует имя "{1}" из закрытого модуля "{2}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Открытый статический метод "{0}" экспортированного класса имеет или использует закрытое имя "{1}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6509,6 +6599,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Последующие объявления свойств должны иметь тот же тип. Свойство "{0}" имеет тип "{1}" в {2}, но здесь оно имеет тип "{3}".]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6737,6 +6830,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Выведенный тип "{0}" ссылается на недоступный тип "{1}". Требуется аннотация типа.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8789,18 +8885,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Типы "уникальный символ" здесь запрещены.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Типы "уникальный символ" разрешены только в переменных в операторе с переменной.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Типы "уникальный символ" невозможно использовать в объявлении переменной с именем привязки.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 44970d1fc65..5bf19ff41b3 100644
--- a/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/trk/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -137,30 +137,45 @@
       <Item ItemId=";A_computed_property_name_in_a_class_property_declaration_must_refer_to_an_expression_whose_type_is_a_1166" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a class property declaration must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir sınıf özelliği bildirimindeki hesaplanan özellik adı, sabit değer türündeki veya 'unique symbol' türündeki bir ifadeye başvurmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_method_overload_must_refer_to_an_expression_whose_type_is_a_literal_ty_1168" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a method overload must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir metot aşırı yüklemesindeki hesaplanan özellik adı, sabit değer türündeki veya 'unique symbol' türündeki bir ifadeye başvurmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_a_type_literal_must_refer_to_an_expression_whose_type_is_a_literal_type__1170" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in a type literal must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir tür sabit değerindeki hesaplanan özellik adı, sabit değer türündeki veya 'unique symbol' türündeki bir ifadeye başvurmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_ambient_context_must_refer_to_an_expression_whose_type_is_a_literal_t_1165" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an ambient context must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir çevresel bağlamdaki hesaplanan özellik adı, sabit değer türündeki veya 'unique symbol' türündeki bir ifadeye başvurmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_computed_property_name_in_an_interface_must_refer_to_an_expression_whose_type_is_a_literal_type_or_1169" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A computed property name in an interface must refer to an expression whose type is a literal type or a 'unique symbol' type.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir arabirimdeki hesaplanan özellik adı, sabit değer türündeki veya 'unique symbol' türündeki bir ifadeye başvurmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -284,6 +299,12 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";A_definite_assignment_assertion_is_not_permitted_in_this_context_1255" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[A definite assignment assertion '!' is not permitted in this context.]]></Val>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";A_destructuring_declaration_must_have_an_initializer_1182" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A destructuring declaration must have an initializer.]]></Val>
@@ -500,12 +521,18 @@
       <Item ItemId=";A_property_of_a_class_whose_type_is_a_unique_symbol_type_must_be_both_static_and_readonly_1331" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of a class whose type is a 'unique symbol' type must be both 'static' and 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir 'unique symbol' türündeki sınıfın özelliği hem 'static' hem de 'readonly' olmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";A_property_of_an_interface_or_type_literal_whose_type_is_a_unique_symbol_type_must_be_readonly_1330" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A property of an interface or type literal whose type is a 'unique symbol' type must be 'readonly'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir 'unique symbol' türündeki arabirimin veya tür sabit değerinin özelliği 'readonly' olmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -758,6 +785,9 @@
       <Item ItemId=";A_variable_whose_type_is_a_unique_symbol_type_must_be_const_1332" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[A variable whose type is a 'unique symbol' type must be 'const'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Bir 'unique symbol' türündeki değişken 'const' olmalıdır.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2576,6 +2606,9 @@
       <Item ItemId=";Duplicate_declaration_0_2718" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Duplicate declaration '{0}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Yinelenen '{0}' bildirimi.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2789,6 +2822,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Enable_strict_checking_of_property_initialization_in_classes_6187" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Enable strict checking of property initialization in classes.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sınıflarda sıkı özellik başlatma denetimini etkinleştirin.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Enable_strict_null_checks_6113" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Enable strict null checks.]]></Val>
@@ -2930,6 +2972,9 @@
       <Item ItemId=";Expected_0_arguments_but_got_1_or_more_2556" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[{0} bağımsız değişken bekleniyordu ancak {1} veya daha fazla bağımsız değişken alındı.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2963,6 +3008,9 @@
       <Item ItemId=";Expected_at_least_0_arguments_but_got_1_or_more_2557" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[En az {0} bağımsız değişken bekleniyordu ancak {1} veya daha fazla bağımsız değişken alındı.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -4499,12 +4547,18 @@
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4101" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan arabirimin '{0}' metodu, '{2}' özel modülündeki '{1}' adına sahip veya bu adı kullanıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Method_0_of_exported_interface_has_or_is_using_private_name_1_4102" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Method '{0}' of exported interface has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan arabirimin '{0}' metodu, '{1}' özel adına sahip veya bu adı kullanıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5432,6 +5486,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_has_no_initializer_and_is_not_definitely_assigned_in_the_constructor_2564" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' has no initializer and is not definitely assigned in the constructor.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' özelliği başlatıcı içermiyor ve oluşturucuda kesin olarak atanmamış.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_implicitly_has_type_any_because_its_get_accessor_lacks_a_return_type_annotation_7033" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' implicitly has type 'any', because its get accessor lacks a return type annotation.]]></Val>
@@ -5552,6 +5615,15 @@
         </Str>
         <Disp Icon="Str" />
       </Item>
+      <Item ItemId=";Property_0_is_used_before_being_assigned_2565" ItemType="0" PsrId="306" Leaf="true">
+        <Str Cat="Text">
+          <Val><![CDATA[Property '{0}' is used before being assigned.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['{0}' özelliği atanmadan önce kullanıldı.]]></Val>
+          </Tgt>
+        </Str>
+        <Disp Icon="Str" />
+      </Item>
       <Item ItemId=";Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Property '{0}' of JSX spread attribute is not assignable to target property.]]></Val>
@@ -5654,18 +5726,27 @@
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4098" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan sınıfın '{0}' genel metodu, {2} dış modülündeki '{1}' adına sahip veya bu adı kullanıyor, ancak adlandırılamıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4099" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan sınıfın '{0}' genel metodu, '{2}' özel modülündeki '{1}' adına sahip veya bu adı kullanıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_method_0_of_exported_class_has_or_is_using_private_name_1_4100" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan sınıfın '{0}' genel metodu, '{1}' özel adına sahip veya bu adı kullanıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -5699,18 +5780,27 @@
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_4095" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan sınıfın '{0}' genel statik metodu, {2} dış modülündeki '{1}' özel adına sahip veya bu adı kullanıyor, ancak adlandırılamıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4096" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using name '{1}' from private module '{2}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan sınıfın '{0}' genel statik metodu, '{2}' özel modülündeki '{1}' adına sahip veya bu adı kullanıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";Public_static_method_0_of_exported_class_has_or_is_using_private_name_1_4097" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Public static method '{0}' of exported class has or is using private name '{1}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Dışarı aktarılan sınıfın '{0}' genel statik metodu, '{1}' özel adına sahip veya bu adı kullanıyor.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6503,6 +6593,9 @@
       <Item ItemId=";Subsequent_property_declarations_must_have_the_same_type_Property_0_has_type_1_at_2_but_here_has_typ_2717" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[Subsequent property declarations must have the same type.  Property '{0}' has type '{1}' at {2}, but here has type '{3}'.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Sonraki özellik bildirimleri aynı türe sahip olmalıdır. '{0}' özelliği {2} konumunda '{1}' türüne sahip, ancak burada '{3}' türüne sahip.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -6731,6 +6824,9 @@
       <Item ItemId=";The_inferred_type_of_0_references_an_inaccessible_1_type_A_type_annotation_is_necessary_2527" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Çıkarsanan '{0}' türü, erişilemeyen bir '{1}' türüne başvuruyor. Tür ek açıklaması gereklidir.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8783,18 +8879,27 @@
       <Item ItemId=";unique_symbol_types_are_not_allowed_here_1335" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are not allowed here.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA[Burada 'unique symbol' türlerine izin verilmez.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_are_only_allowed_on_variables_in_a_variable_statement_1334" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types are only allowed on variables in a variable statement.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['unique symbol' türlerine yalnızca bir değişken deyimindeki değişkenlerde izin verilir.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
       <Item ItemId=";unique_symbol_types_may_not_be_used_on_a_variable_declaration_with_a_binding_name_1333" ItemType="0" PsrId="306" Leaf="true">
         <Str Cat="Text">
           <Val><![CDATA['unique symbol' types may not be used on a variable declaration with a binding name.]]></Val>
+          <Tgt Cat="Text" Stat="Loc" Orig="New">
+            <Val><![CDATA['unique symbol' türleri, bağlama adına sahip bir değişken bildiriminde kullanılamaz.]]></Val>
+          </Tgt>
         </Str>
         <Disp Icon="Str" />
       </Item>
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index bda540d6b39..a5b09c6a63f 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -527,7 +527,11 @@ namespace ts.server {
                 }
                 // raw is now fixed and ready
                 this.safelist = raw.typesMap;
-                this.legacySafelist = raw.simpleMap;
+                for (const key in raw.simpleMap) {
+                    if (raw.simpleMap.hasOwnProperty(key)) {
+                        this.legacySafelist[key] = raw.simpleMap[key].toLowerCase();
+                    }
+                }
             }
             catch (e) {
                 this.logger.info(`Error loading types map: ${e}`);
@@ -536,7 +540,7 @@ namespace ts.server {
             }
         }
 
-        updateTypingsForProject(response: SetTypings | InvalidateCachedTypings): void {
+        updateTypingsForProject(response: SetTypings | InvalidateCachedTypings | PackageInstalledResponse): void {
             const project = this.findProject(response.projectName);
             if (!project) {
                 return;
diff --git a/src/server/project.ts b/src/server/project.ts
index 8988e8b1bec..ce750c78e23 100644
--- a/src/server/project.ts
+++ b/src/server/project.ts
@@ -249,7 +249,7 @@ namespace ts.server {
             return this.typingsCache.isKnownTypesPackageName(name);
         }
         installPackage(options: InstallPackageOptions): Promise<ApplyCodeActionCommandResult> {
-            return this.typingsCache.installPackage({ ...options, projectRootPath: this.toPath(this.currentDirectory) });
+            return this.typingsCache.installPackage({ ...options, projectName: this.projectName, projectRootPath: this.toPath(this.currentDirectory) });
         }
         private get typingsCache(): TypingsCache {
             return this.projectService.typingsCache;
diff --git a/src/server/server.ts b/src/server/server.ts
index fb0b3b781af..86349fa2be5 100644
--- a/src/server/server.ts
+++ b/src/server/server.ts
@@ -290,7 +290,7 @@ namespace ts.server {
             return false;
         }
 
-        installPackage(options: InstallPackageOptionsWithProjectRootPath): Promise<ApplyCodeActionCommandResult> {
+        installPackage(options: InstallPackageOptionsWithProject): Promise<ApplyCodeActionCommandResult> {
             const rq: InstallPackageRequest = { kind: "installPackage", ...options };
             this.send(rq);
             Debug.assert(this.packageInstalledPromise === undefined);
@@ -392,7 +392,7 @@ namespace ts.server {
                 case EventTypesRegistry:
                     this.typesRegistryCache = ts.createMapFromTemplate(response.typesRegistry);
                     break;
-                case EventPackageInstalled: {
+                case ActionPackageInstalled: {
                     const { success, message } = response;
                     if (success) {
                         this.packageInstalledPromise.resolve({ successMessage: message });
@@ -401,6 +401,11 @@ namespace ts.server {
                         this.packageInstalledPromise.reject(message);
                     }
                     this.packageInstalledPromise = undefined;
+
+                    this.projectService.updateTypingsForProject(response);
+
+                    // The behavior is the same as for setTypings, so send the same event.
+                    this.event(response, "setTypings");
                     break;
                 }
                 case EventInitializationFailed:
@@ -502,7 +507,7 @@ namespace ts.server {
         constructor(options: IoSessionOptions) {
             const { host, eventPort, globalTypingsCacheLocation, typingSafeListLocation, typesMapLocation, npmLocation, canUseEvents } = options;
 
-            const event: Event | undefined = (body: {}, eventName: string) => {
+            const event: Event | undefined = (body: object, eventName: string) => {
                 if (this.constructed) {
                     this.event(body, eventName);
                 }
@@ -551,7 +556,7 @@ namespace ts.server {
             this.constructed = true;
         }
 
-        event<T>(body: T, eventName: string): void {
+        event<T extends object>(body: T, eventName: string): void {
             Debug.assert(this.constructed, "Should only call `IOSession.prototype.event` on an initialized IOSession");
 
             if (this.canUseEvents && this.eventPort) {
@@ -572,8 +577,8 @@ namespace ts.server {
             }
         }
 
-        private writeToEventSocket(body: any, eventName: string): void {
-            this.eventSocket.write(formatMessage(toEvent(body, eventName), this.logger, this.byteLength, this.host.newLine), "utf8");
+        private writeToEventSocket(body: object, eventName: string): void {
+            this.eventSocket.write(formatMessage(toEvent(eventName, body), this.logger, this.byteLength, this.host.newLine), "utf8");
         }
 
         exit() {
diff --git a/src/server/session.ts b/src/server/session.ts
index 9e6378ebebf..309a6aef0ca 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -239,14 +239,14 @@ namespace ts.server {
         }
     }
 
-    export type Event = <T>(body: T, eventName: string) => void;
+    export type Event = <T extends object>(body: T, eventName: string) => void;
 
     export interface EventSender {
         event: Event;
     }
 
     /** @internal */
-    export function toEvent(eventName: string, body: {}): protocol.Event {
+    export function toEvent(eventName: string, body: object): protocol.Event {
         return {
             seq: 0,
             type: "event",
@@ -409,7 +409,7 @@ namespace ts.server {
             this.host.write(formatMessage(msg, this.logger, this.byteLength, this.host.newLine));
         }
 
-        public event<T>(body: T, eventName: string): void {
+        public event<T extends object>(body: T, eventName: string): void {
             this.send(toEvent(eventName, body));
         }
 
diff --git a/src/server/shared.ts b/src/server/shared.ts
index 99a38eba389..e8b64ce06ec 100644
--- a/src/server/shared.ts
+++ b/src/server/shared.ts
@@ -4,8 +4,8 @@ namespace ts.server {
     // tslint:disable variable-name
     export const ActionSet: ActionSet = "action::set";
     export const ActionInvalidate: ActionInvalidate = "action::invalidate";
+    export const ActionPackageInstalled: ActionPackageInstalled = "action::packageInstalled";
     export const EventTypesRegistry: EventTypesRegistry = "event::typesRegistry";
-    export const EventPackageInstalled: EventPackageInstalled = "event::packageInstalled";
     export const EventBeginInstallTypes: EventBeginInstallTypes = "event::beginInstallTypes";
     export const EventEndInstallTypes: EventEndInstallTypes = "event::endInstallTypes";
     export const EventInitializationFailed: EventInitializationFailed = "event::initializationFailed";
diff --git a/src/server/types.ts b/src/server/types.ts
index af5e121278e..32132ed278b 100644
--- a/src/server/types.ts
+++ b/src/server/types.ts
@@ -53,7 +53,7 @@ declare namespace ts.server {
         readonly kind: "typesRegistry";
     }
 
-    export interface InstallPackageRequest {
+    export interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
         readonly kind: "installPackage";
         readonly fileName: Path;
         readonly packageName: string;
@@ -62,14 +62,14 @@ declare namespace ts.server {
 
     export type ActionSet = "action::set";
     export type ActionInvalidate = "action::invalidate";
+    export type ActionPackageInstalled = "action::packageInstalled";
     export type EventTypesRegistry = "event::typesRegistry";
-    export type EventPackageInstalled = "event::packageInstalled";
     export type EventBeginInstallTypes = "event::beginInstallTypes";
     export type EventEndInstallTypes = "event::endInstallTypes";
     export type EventInitializationFailed = "event::initializationFailed";
 
     export interface TypingInstallerResponse {
-        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | EventPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
+        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
     }
     /* @internal */
     export type TypingInstallerResponseUnion = SetTypings | InvalidateCachedTypings | TypesRegistryResponse | PackageInstalledResponse | InstallTypes | InitializationFailedResponse;
@@ -80,9 +80,8 @@ declare namespace ts.server {
         readonly typesRegistry: MapLike<void>;
     }
 
-    /* @internal */
-    export interface PackageInstalledResponse extends TypingInstallerResponse {
-        readonly kind: EventPackageInstalled;
+    export interface PackageInstalledResponse extends ProjectResponse {
+        readonly kind: ActionPackageInstalled;
         readonly success: boolean;
         readonly message: string;
     }
diff --git a/src/server/typingsCache.ts b/src/server/typingsCache.ts
index cde303bfd39..a1d8f65f6e0 100644
--- a/src/server/typingsCache.ts
+++ b/src/server/typingsCache.ts
@@ -1,14 +1,15 @@
 /// <reference path="project.ts"/>
 
 namespace ts.server {
-    export interface InstallPackageOptionsWithProjectRootPath extends InstallPackageOptions {
+    export interface InstallPackageOptionsWithProject extends InstallPackageOptions {
+        projectName: string;
         projectRootPath: Path;
     }
 
     // tslint:disable-next-line interface-name (for backwards-compatibility)
     export interface ITypingsInstaller {
         isKnownTypesPackageName(name: string): boolean;
-        installPackage(options: InstallPackageOptionsWithProjectRootPath): Promise<ApplyCodeActionCommandResult>;
+        installPackage(options: InstallPackageOptionsWithProject): Promise<ApplyCodeActionCommandResult>;
         enqueueInstallTypingsRequest(p: Project, typeAcquisition: TypeAcquisition, unresolvedImports: SortedReadonlyArray<string>): void;
         attach(projectService: ProjectService): void;
         onProjectClosed(p: Project): void;
@@ -91,7 +92,7 @@ namespace ts.server {
             return this.installer.isKnownTypesPackageName(name);
         }
 
-        installPackage(options: InstallPackageOptionsWithProjectRootPath): Promise<ApplyCodeActionCommandResult> {
+        installPackage(options: InstallPackageOptionsWithProject): Promise<ApplyCodeActionCommandResult> {
             return this.installer.installPackage(options);
         }
 
diff --git a/src/server/typingsInstaller/nodeTypingsInstaller.ts b/src/server/typingsInstaller/nodeTypingsInstaller.ts
index da16d5dde82..36f5adab400 100644
--- a/src/server/typingsInstaller/nodeTypingsInstaller.ts
+++ b/src/server/typingsInstaller/nodeTypingsInstaller.ts
@@ -150,17 +150,17 @@ namespace ts.server.typingsInstaller {
                         break;
                     }
                     case "installPackage": {
-                        const { fileName, packageName, projectRootPath } = req;
+                        const { fileName, packageName, projectName, projectRootPath } = req;
                         const cwd = getDirectoryOfPackageJson(fileName, this.installTypingHost) || projectRootPath;
                         if (cwd) {
                             this.installWorker(-1, [packageName], cwd, success => {
                                 const message = success ? `Package ${packageName} installed.` : `There was an error installing ${packageName}.`;
-                                const response: PackageInstalledResponse = { kind: EventPackageInstalled, success, message };
+                                const response: PackageInstalledResponse = { kind: ActionPackageInstalled, projectName, success, message };
                                 this.sendResponse(response);
                             });
                         }
                         else {
-                            const response: PackageInstalledResponse = { kind: EventPackageInstalled, success: false, message: "Could not determine a project root path." };
+                            const response: PackageInstalledResponse = { kind: ActionPackageInstalled, projectName, success: false, message: "Could not determine a project root path." };
                             this.sendResponse(response);
                         }
                         break;
diff --git a/src/server/typingsInstaller/typingsInstaller.ts b/src/server/typingsInstaller/typingsInstaller.ts
index 63bbc219789..3e8f79d0f1d 100644
--- a/src/server/typingsInstaller/typingsInstaller.ts
+++ b/src/server/typingsInstaller/typingsInstaller.ts
@@ -257,8 +257,9 @@ namespace ts.server.typingsInstaller {
             const filteredTypings = this.filterTypings(typingsToInstall);
             if (filteredTypings.length === 0) {
                 if (this.log.isEnabled()) {
-                    this.log.writeLine(`All typings are known to be missing or invalid - no need to go any further`);
+                    this.log.writeLine(`All typings are known to be missing or invalid - no need to install more typings`);
                 }
+                this.sendResponse(this.createSetTypings(req, currentlyCachedTypings));
                 return;
             }
 
diff --git a/src/server/utilities.ts b/src/server/utilities.ts
index c57d3b40dee..d76ff1bf6d0 100644
--- a/src/server/utilities.ts
+++ b/src/server/utilities.ts
@@ -43,7 +43,7 @@ namespace ts.server {
                 return <Path>"";
             case ProjectKind.External:
                 const projectName = normalizeSlashes(project.getProjectName());
-                return project.projectService.host.fileExists(projectName) ? <Path>getDirectoryPath(projectName) : <Path>projectName;
+                return <Path>getDirectoryPath(projectName);
         }
     }
 
diff --git a/src/services/codefixes/importFixes.ts b/src/services/codefixes/importFixes.ts
index ec56a08656c..41515265862 100644
--- a/src/services/codefixes/importFixes.ts
+++ b/src/services/codefixes/importFixes.ts
@@ -209,8 +209,7 @@ namespace ts.codefix {
                 }
             }
         }
-        actions.push(getCodeActionForAddImport(moduleSymbols, context, declarations));
-        return actions;
+        return [...actions, ...getCodeActionsForAddImport(moduleSymbols, context, declarations)];
     }
 
     function getNamespaceImportName(declaration: AnyImportSyntax): Identifier {
@@ -276,17 +275,11 @@ namespace ts.codefix {
             }
         });
 
-        const actionFormat = kind === ImportKind.Equals
-            ? Diagnostics.Import_0_require_1
-            : kind === ImportKind.Namespace
-                ? Diagnostics.Import_Asterisk_as_0_from_1
-                : Diagnostics.Import_0_from_1;
-
         // if this file doesn't have any import statements, insert an import statement and then insert a new line
         // between the only import statement and user code. Otherwise just insert the statement because chances
         // are there are already a new line seperating code and import statements.
         return createCodeAction(
-            actionFormat,
+            Diagnostics.Import_0_from_module_1,
             [symbolName, moduleSpecifierWithoutQuotes],
             changes,
             "NewImport",
@@ -315,19 +308,84 @@ namespace ts.codefix {
         }
     }
 
-    export function getModuleSpecifierForNewImport(sourceFile: SourceFile, moduleSymbols: ReadonlyArray<Symbol>, options: CompilerOptions, getCanonicalFileName: (file: string) => string, host: LanguageServiceHost): string | undefined {
-        const choices = mapIterator(arrayIterator(moduleSymbols), moduleSymbol => {
+    export function getModuleSpecifiersForNewImport(
+        sourceFile: SourceFile,
+        moduleSymbols: ReadonlyArray<Symbol>,
+        options: CompilerOptions,
+        getCanonicalFileName: (file: string) => string,
+        host: LanguageServiceHost,
+    ): string[] {
+        const { baseUrl, paths, rootDirs } = options;
+        const choicesForEachExportingModule = mapIterator(arrayIterator(moduleSymbols), moduleSymbol => {
             const moduleFileName = moduleSymbol.valueDeclaration.getSourceFile().fileName;
             const sourceDirectory = getDirectoryPath(sourceFile.fileName);
+            const global = tryGetModuleNameFromAmbientModule(moduleSymbol)
+                || tryGetModuleNameFromTypeRoots(options, host, getCanonicalFileName, moduleFileName)
+                || tryGetModuleNameAsNodeModule(options, moduleFileName, host, getCanonicalFileName, sourceDirectory)
+                || rootDirs && tryGetModuleNameFromRootDirs(rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName);
+            if (global) {
+                return [global];
+            }
 
-            return tryGetModuleNameFromAmbientModule(moduleSymbol) ||
-                tryGetModuleNameFromTypeRoots(options, host, getCanonicalFileName, moduleFileName) ||
-                tryGetModuleNameAsNodeModule(options, moduleFileName, host, getCanonicalFileName, sourceDirectory) ||
-                tryGetModuleNameFromBaseUrl(options, moduleFileName, getCanonicalFileName) ||
-                options.rootDirs && tryGetModuleNameFromRootDirs(options.rootDirs, moduleFileName, sourceDirectory, getCanonicalFileName) ||
-                removeExtensionAndIndexPostFix(getRelativePath(moduleFileName, sourceDirectory, getCanonicalFileName), options);
+            const relativePath = removeExtensionAndIndexPostFix(getRelativePath(moduleFileName, sourceDirectory, getCanonicalFileName), options);
+            if (!baseUrl) {
+                return [relativePath];
+            }
+
+            const relativeToBaseUrl = getRelativePathIfInDirectory(moduleFileName, baseUrl, getCanonicalFileName);
+            if (!relativeToBaseUrl) {
+                return [relativePath];
+            }
+
+            const importRelativeToBaseUrl = removeExtensionAndIndexPostFix(relativeToBaseUrl, options);
+            if (paths) {
+                const fromPaths = tryGetModuleNameFromPaths(removeFileExtension(relativeToBaseUrl), importRelativeToBaseUrl, paths);
+                if (fromPaths) {
+                    return [fromPaths];
+                }
+            }
+
+            /*
+            Prefer a relative import over a baseUrl import if it doesn't traverse up to baseUrl.
+
+            Suppose we have:
+                baseUrl = /base
+                sourceDirectory = /base/a/b
+                moduleFileName = /base/foo/bar
+            Then:
+                relativePath = ../../foo/bar
+                getRelativePathNParents(relativePath) = 2
+                pathFromSourceToBaseUrl = ../../
+                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
+                2 < 2 = false
+            In this case we should prefer using the baseUrl path "/a/b" instead of the relative path "../../foo/bar".
+
+            Suppose we have:
+                baseUrl = /base
+                sourceDirectory = /base/foo/a
+                moduleFileName = /base/foo/bar
+            Then:
+                relativePath = ../a
+                getRelativePathNParents(relativePath) = 1
+                pathFromSourceToBaseUrl = ../../
+                getRelativePathNParents(pathFromSourceToBaseUrl) = 2
+                1 < 2 = true
+            In this case we should prefer using the relative path "../a" instead of the baseUrl path "foo/a".
+            */
+            const pathFromSourceToBaseUrl = getRelativePath(baseUrl, sourceDirectory, getCanonicalFileName);
+            const relativeFirst = getRelativePathNParents(pathFromSourceToBaseUrl) < getRelativePathNParents(relativePath);
+            return relativeFirst ? [relativePath, importRelativeToBaseUrl] : [importRelativeToBaseUrl, relativePath];
         });
-        return best(choices, (a, b) => a.length < b.length);
+        // Only return results for the re-export with the shortest possible path (and also give the other path even if that's long.)
+        return best(choicesForEachExportingModule, (a, b) => a[0].length < b[0].length);
+    }
+
+    function getRelativePathNParents(relativePath: string): number {
+        let count = 0;
+        for (let i = 0; i + 3 <= relativePath.length && relativePath.slice(i, i + 3) === "../"; i += 3) {
+            count++;
+        }
+        return count;
     }
 
     function tryGetModuleNameFromAmbientModule(moduleSymbol: Symbol): string | undefined {
@@ -337,44 +395,28 @@ namespace ts.codefix {
         }
     }
 
-    function tryGetModuleNameFromBaseUrl(options: CompilerOptions, moduleFileName: string, getCanonicalFileName: (file: string) => string): string | undefined {
-        if (!options.baseUrl) {
-            return undefined;
-        }
-
-        let relativeName = getRelativePathIfInDirectory(moduleFileName, options.baseUrl, getCanonicalFileName);
-        if (!relativeName) {
-            return undefined;
-        }
-
-        const relativeNameWithIndex = removeFileExtension(relativeName);
-        relativeName = removeExtensionAndIndexPostFix(relativeName, options);
-
-        if (options.paths) {
-            for (const key in options.paths) {
-                for (const pattern of options.paths[key]) {
-                    const indexOfStar = pattern.indexOf("*");
-                    if (indexOfStar === 0 && pattern.length === 1) {
-                        continue;
-                    }
-                    else if (indexOfStar !== -1) {
-                        const prefix = pattern.substr(0, indexOfStar);
-                        const suffix = pattern.substr(indexOfStar + 1);
-                        if (relativeName.length >= prefix.length + suffix.length &&
-                            startsWith(relativeName, prefix) &&
-                            endsWith(relativeName, suffix)) {
-                            const matchedStar = relativeName.substr(prefix.length, relativeName.length - suffix.length);
-                            return key.replace("\*", matchedStar);
-                        }
-                    }
-                    else if (pattern === relativeName || pattern === relativeNameWithIndex) {
-                        return key;
+    function tryGetModuleNameFromPaths(relativeNameWithIndex: string, relativeName: string, paths: MapLike<ReadonlyArray<string>>): string | undefined {
+        for (const key in paths) {
+            for (const pattern of paths[key]) {
+                const indexOfStar = pattern.indexOf("*");
+                if (indexOfStar === 0 && pattern.length === 1) {
+                    continue;
+                }
+                else if (indexOfStar !== -1) {
+                    const prefix = pattern.substr(0, indexOfStar);
+                    const suffix = pattern.substr(indexOfStar + 1);
+                    if (relativeName.length >= prefix.length + suffix.length &&
+                        startsWith(relativeName, prefix) &&
+                        endsWith(relativeName, suffix)) {
+                        const matchedStar = relativeName.substr(prefix.length, relativeName.length - suffix.length);
+                        return key.replace("\*", matchedStar);
                     }
                 }
+                else if (pattern === relativeName || pattern === relativeNameWithIndex) {
+                    return key;
+                }
             }
         }
-
-        return relativeName;
     }
 
     function tryGetModuleNameFromRootDirs(rootDirs: ReadonlyArray<string>, moduleFileName: string, sourceDirectory: string, getCanonicalFileName: (file: string) => string): string | undefined {
@@ -547,10 +589,11 @@ namespace ts.codefix {
         return !pathIsRelative(relativePath) ? "./" + relativePath : relativePath;
     }
 
-    function getCodeActionForAddImport(
+    function getCodeActionsForAddImport(
         moduleSymbols: ReadonlyArray<Symbol>,
         ctx: ImportCodeFixOptions,
-        declarations: ReadonlyArray<AnyImportSyntax>): ImportCodeAction {
+        declarations: ReadonlyArray<AnyImportSyntax>
+    ): ImportCodeAction[] {
         const fromExistingImport = firstDefined(declarations, declaration => {
             if (declaration.kind === SyntaxKind.ImportDeclaration && declaration.importClause) {
                 const changes = tryUpdateExistingImport(ctx, isImportClause(declaration.importClause) && declaration.importClause || undefined);
@@ -566,12 +609,12 @@ namespace ts.codefix {
             }
         });
         if (fromExistingImport) {
-            return fromExistingImport;
+            return [fromExistingImport];
         }
 
-        const moduleSpecifier = firstDefined(declarations, moduleSpecifierFromAnyImport)
-            || getModuleSpecifierForNewImport(ctx.sourceFile, moduleSymbols, ctx.compilerOptions, ctx.getCanonicalFileName, ctx.host);
-        return getCodeActionForNewImport(ctx, moduleSpecifier);
+        const existingDeclaration = firstDefined(declarations, moduleSpecifierFromAnyImport);
+        const moduleSpecifiers = existingDeclaration ? [existingDeclaration] : getModuleSpecifiersForNewImport(ctx.sourceFile, moduleSymbols, ctx.compilerOptions, ctx.getCanonicalFileName, ctx.host);
+        return moduleSpecifiers.map(spec => getCodeActionForNewImport(ctx, spec));
     }
 
     function moduleSpecifierFromAnyImport(node: AnyImportSyntax): string | undefined {
diff --git a/src/services/completions.ts b/src/services/completions.ts
index 6bbdfacac4c..a3b94acd4c0 100644
--- a/src/services/completions.ts
+++ b/src/services/completions.ts
@@ -488,7 +488,7 @@ namespace ts.Completions {
         const moduleSymbols = getAllReExportingModules(exportedSymbol, checker, allSourceFiles);
         Debug.assert(contains(moduleSymbols, moduleSymbol));
 
-        const sourceDisplay = [textPart(codefix.getModuleSpecifierForNewImport(sourceFile, moduleSymbols, compilerOptions, getCanonicalFileName, host))];
+        const sourceDisplay = [textPart(first(codefix.getModuleSpecifiersForNewImport(sourceFile, moduleSymbols, compilerOptions, getCanonicalFileName, host)))];
         const codeActions = codefix.getCodeActionForImport(moduleSymbols, {
             host,
             checker,
@@ -942,6 +942,7 @@ namespace ts.Completions {
                     scopeNode.kind === SyntaxKind.SourceFile ||
                     scopeNode.kind === SyntaxKind.TemplateExpression ||
                     scopeNode.kind === SyntaxKind.JsxExpression ||
+                    scopeNode.kind === SyntaxKind.Block || // Some blocks aren't statements, but all get global completions
                     isStatement(scopeNode);
             }
 
diff --git a/src/services/documentRegistry.ts b/src/services/documentRegistry.ts
index 0c3d4d1cb48..81742018fb7 100644
--- a/src/services/documentRegistry.ts
+++ b/src/services/documentRegistry.ts
@@ -24,9 +24,9 @@ namespace ts {
          * @param compilationSettings Some compilation settings like target affects the
          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
          * multiple copies of the same file for different compilation settings.
-         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * @param scriptSnapshot Text of the file. Only used if the file was not found
          * in the registry and a new one was created.
-         * @parm version Current version of the file. Only used if the file was not found
+         * @param version Current version of the file. Only used if the file was not found
          * in the registry and a new one was created.
          */
         acquireDocument(
diff --git a/src/services/findAllReferences.ts b/src/services/findAllReferences.ts
index 0f64321f1be..86db21e3225 100644
--- a/src/services/findAllReferences.ts
+++ b/src/services/findAllReferences.ts
@@ -1427,10 +1427,7 @@ namespace ts.FindAllReferences.Core {
         // we should include both parameter declaration symbol and property declaration symbol
         // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
         // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
-        if (symbol.valueDeclaration && symbol.valueDeclaration.kind === SyntaxKind.Parameter &&
-            isParameterPropertyDeclaration(<ParameterDeclaration>symbol.valueDeclaration)) {
-            addRange(result, checker.getSymbolsOfParameterPropertyDeclaration(<ParameterDeclaration>symbol.valueDeclaration, symbol.name));
-        }
+        addRange(result, getParameterPropertySymbols(symbol, checker));
 
         // If this is symbol of binding element without propertyName declaration in Object binding pattern
         // Include the property in the search
@@ -1460,6 +1457,12 @@ namespace ts.FindAllReferences.Core {
         }
     }
 
+    function getParameterPropertySymbols(symbol: Symbol, checker: TypeChecker): Symbol[] {
+        return symbol.valueDeclaration && isParameter(symbol.valueDeclaration) && isParameterPropertyDeclaration(symbol.valueDeclaration)
+            ? checker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name)
+            : undefined;
+    }
+
     /**
      * Find symbol of the given property-name and add the symbol to the given result array
      * @param symbol a symbol to start searching for the given propertyName
@@ -1519,17 +1522,26 @@ namespace ts.FindAllReferences.Core {
     }
 
     function getRelatedSymbol(search: Search, referenceSymbol: Symbol, referenceLocation: Node, state: State): Symbol | undefined {
+        const { checker } = state;
         if (search.includes(referenceSymbol)) {
             return referenceSymbol;
         }
 
+        if (referenceSymbol.flags & SymbolFlags.FunctionScopedVariable) {
+            Debug.assert(!(referenceSymbol.flags & SymbolFlags.Property));
+            const paramProps = getParameterPropertySymbols(referenceSymbol, checker);
+            if (paramProps) {
+                return getRelatedSymbol(search, find(paramProps, x => !!(x.flags & SymbolFlags.Property))!, referenceLocation, state);
+            }
+        }
+
         // If the reference location is in an object literal, try to get the contextual type for the
         // object literal, lookup the property symbol in the contextual type, and use this symbol to
         // compare to our searchSymbol
         const containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
         if (containingObjectLiteralElement) {
-            const contextualSymbol = forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, state.checker), contextualSymbol =>
-                find(state.checker.getRootSymbols(contextualSymbol), search.includes));
+            const contextualSymbol = forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement, checker), contextualSymbol =>
+                find(checker.getRootSymbols(contextualSymbol), search.includes));
 
             if (contextualSymbol) {
                 return contextualSymbol;
@@ -1539,7 +1551,7 @@ namespace ts.FindAllReferences.Core {
             // Get the property symbol from the object literal's type and look if thats the search symbol
             // In below eg. get 'property' from type of elems iterating type
             //      for ( { property: p2 } of elems) { }
-            const propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation, state.checker);
+            const propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation, checker);
             if (propertySymbol && search.includes(propertySymbol)) {
                 return propertySymbol;
             }
@@ -1548,7 +1560,7 @@ namespace ts.FindAllReferences.Core {
         // If the reference location is the binding element and doesn't have property name
         // then include the binding element in the related symbols
         //      let { a } : { a };
-        const bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol, state.checker);
+        const bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol, checker);
         if (bindingElementPropertySymbol) {
             const fromBindingElement = findRootSymbol(bindingElementPropertySymbol);
             if (fromBindingElement) return fromBindingElement;
diff --git a/src/services/outliningElementsCollector.ts b/src/services/outliningElementsCollector.ts
index bd294209088..f3f91724a9c 100644
--- a/src/services/outliningElementsCollector.ts
+++ b/src/services/outliningElementsCollector.ts
@@ -1,227 +1,166 @@
 /* @internal */
 namespace ts.OutliningElementsCollector {
-    const collapseText = "...";
-    const maxDepth = 40;
-    const defaultLabel = "#region";
-    const regionMatch = new RegExp("^\\s*//\\s*#(end)?region(?:\\s+(.*))?$");
-
     export function collectElements(sourceFile: SourceFile, cancellationToken: CancellationToken): OutliningSpan[] {
-        const elements: OutliningSpan[] = [];
-        let depth = 0;
-        const regions: OutliningSpan[] = [];
+        const res: OutliningSpan[] = [];
+        addNodeOutliningSpans(sourceFile, cancellationToken, res);
+        addRegionOutliningSpans(sourceFile, res);
+        return res.sort((span1, span2) => span1.textSpan.start - span2.textSpan.start);
+    }
 
-        walk(sourceFile);
-        gatherRegions();
-        return elements.sort((span1, span2) => span1.textSpan.start - span2.textSpan.start);
-
-        /** If useFullStart is true, then the collapsing span includes leading whitespace, including linebreaks. */
-        function addOutliningSpan(hintSpanNode: Node, startElement: Node, endElement: Node, autoCollapse: boolean, useFullStart: boolean) {
-            if (hintSpanNode && startElement && endElement) {
-                const span: OutliningSpan = {
-                    textSpan: createTextSpanFromBounds(useFullStart ? startElement.getFullStart() : startElement.getStart(), endElement.getEnd()),
-                    hintSpan: createTextSpanFromNode(hintSpanNode, sourceFile),
-                    bannerText: collapseText,
-                    autoCollapse,
-                };
-                elements.push(span);
-            }
-        }
-
-        function addOutliningSpanComments(commentSpan: CommentRange, autoCollapse: boolean) {
-            if (commentSpan) {
-                const span: OutliningSpan = {
-                    textSpan: createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                    hintSpan: createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                    bannerText: collapseText,
-                    autoCollapse,
-                };
-                elements.push(span);
-            }
-        }
-
-        function addOutliningForLeadingCommentsForNode(n: Node) {
-            const comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
-
-            if (comments) {
-                let firstSingleLineCommentStart = -1;
-                let lastSingleLineCommentEnd = -1;
-                let isFirstSingleLineComment = true;
-                let singleLineCommentCount = 0;
-
-                for (const currentComment of comments) {
-                    cancellationToken.throwIfCancellationRequested();
-
-                    // For single line comments, combine consecutive ones (2 or more) into
-                    // a single span from the start of the first till the end of the last
-                    if (currentComment.kind === SyntaxKind.SingleLineCommentTrivia) {
-                        if (isFirstSingleLineComment) {
-                            firstSingleLineCommentStart = currentComment.pos;
-                        }
-                        isFirstSingleLineComment = false;
-                        lastSingleLineCommentEnd = currentComment.end;
-                        singleLineCommentCount++;
-                    }
-                    else if (currentComment.kind === SyntaxKind.MultiLineCommentTrivia) {
-                        combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                        addOutliningSpanComments(currentComment, /*autoCollapse*/ false);
-
-                        singleLineCommentCount = 0;
-                        lastSingleLineCommentEnd = -1;
-                        isFirstSingleLineComment = true;
-                    }
-                }
-
-                combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-            }
-        }
-
-        function combineAndAddMultipleSingleLineComments(count: number, start: number, end: number) {
-
-            // Only outline spans of two or more consecutive single line comments
-            if (count > 1) {
-                const multipleSingleLineComments: CommentRange = {
-                    kind: SyntaxKind.SingleLineCommentTrivia,
-                    pos: start,
-                    end,
-                };
-
-                addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
-            }
-        }
-
-        function autoCollapse(node: Node) {
-            return isFunctionBlock(node) && node.parent.kind !== SyntaxKind.ArrowFunction;
-        }
-
-        function gatherRegions(): void {
-            const lineStarts = sourceFile.getLineStarts();
-
-            for (let i = 0; i < lineStarts.length; i++) {
-                const currentLineStart = lineStarts[i];
-                const lineEnd = lineStarts[i + 1] - 1 || sourceFile.getEnd();
-                const comment = sourceFile.text.substring(currentLineStart, lineEnd);
-                const result = comment.match(regionMatch);
-
-                if (result && !isInComment(sourceFile, currentLineStart)) {
-                    if (!result[1]) {
-                        const start = sourceFile.getFullText().indexOf("//", currentLineStart);
-                        const textSpan = createTextSpanFromBounds(start, lineEnd);
-                        const region: OutliningSpan = {
-                            textSpan,
-                            hintSpan: textSpan,
-                            bannerText: result[2] || defaultLabel,
-                            autoCollapse: false
-                        };
-                        regions.push(region);
-                    }
-                    else {
-                        const region = regions.pop();
-                        if (region) {
-                            region.textSpan.length = lineEnd - region.textSpan.start;
-                            region.hintSpan.length = lineEnd - region.textSpan.start;
-                            elements.push(region);
-                        }
-                    }
-                }
-            }
-        }
-
-        function walk(n: Node): void {
+    function addNodeOutliningSpans(sourceFile: SourceFile, cancellationToken: CancellationToken, out: Push<OutliningSpan>): void {
+        let depthRemaining = 40;
+        sourceFile.forEachChild(function walk(n) {
+            if (depthRemaining === 0) return;
             cancellationToken.throwIfCancellationRequested();
-            if (depth > maxDepth) {
-                return;
-            }
 
             if (isDeclaration(n)) {
-                addOutliningForLeadingCommentsForNode(n);
+                addOutliningForLeadingCommentsForNode(n, sourceFile, cancellationToken, out);
             }
 
-            switch (n.kind) {
-                case SyntaxKind.Block:
-                    if (!isFunctionBlock(n)) {
-                        const parent = n.parent;
-                        const openBrace = findChildOfKind(n, SyntaxKind.OpenBraceToken, sourceFile);
-                        const closeBrace = findChildOfKind(n, SyntaxKind.CloseBraceToken, sourceFile);
+            const span = getOutliningSpanForNode(n, sourceFile);
+            if (span) out.push(span);
 
-                        // Check if the block is standalone, or 'attached' to some parent statement.
-                        // If the latter, we want to collapse the block, but consider its hint span
-                        // to be the entire span of the parent.
-                        if (parent.kind === SyntaxKind.DoStatement ||
-                            parent.kind === SyntaxKind.ForInStatement ||
-                            parent.kind === SyntaxKind.ForOfStatement ||
-                            parent.kind === SyntaxKind.ForStatement ||
-                            parent.kind === SyntaxKind.IfStatement ||
-                            parent.kind === SyntaxKind.WhileStatement ||
-                            parent.kind === SyntaxKind.WithStatement ||
-                            parent.kind === SyntaxKind.CatchClause) {
+            depthRemaining--;
+            n.forEachChild(walk);
+            depthRemaining++;
+        });
+    }
 
-                            addOutliningSpan(parent, openBrace, closeBrace, autoCollapse(n), /*useFullStart*/ true);
-                            break;
-                        }
+    function addRegionOutliningSpans(sourceFile: SourceFile, out: Push<OutliningSpan>): void {
+        const regions: OutliningSpan[] = [];
+        const lineStarts = sourceFile.getLineStarts();
+        for (let i = 0; i < lineStarts.length; i++) {
+            const currentLineStart = lineStarts[i];
+            const lineEnd = i + 1 === lineStarts.length ? sourceFile.getEnd() : lineStarts[i + 1] - 1;
+            const lineText = sourceFile.text.substring(currentLineStart, lineEnd);
+            const result = lineText.match(/^\s*\/\/\s*#(end)?region(?:\s+(.*))?$/);
+            if (!result || isInComment(sourceFile, currentLineStart)) {
+                continue;
+            }
 
-                        if (parent.kind === SyntaxKind.TryStatement) {
-                            // Could be the try-block, or the finally-block.
-                            const tryStatement = <TryStatement>parent;
-                            if (tryStatement.tryBlock === n) {
-                                addOutliningSpan(parent, openBrace, closeBrace, autoCollapse(n), /*useFullStart*/ true);
-                                break;
-                            }
-                            else if (tryStatement.finallyBlock === n) {
-                                const finallyKeyword = findChildOfKind(tryStatement, SyntaxKind.FinallyKeyword, sourceFile);
-                                if (finallyKeyword) {
-                                    addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n), /*useFullStart*/ true);
-                                    break;
-                                }
-                            }
-
-                            // fall through.
-                        }
-
-                        // Block was a standalone block.  In this case we want to only collapse
-                        // the span of the block, independent of any parent span.
-                        const span = createTextSpanFromNode(n);
-                        elements.push({
-                            textSpan: span,
-                            hintSpan: span,
-                            bannerText: collapseText,
-                            autoCollapse: autoCollapse(n)
-                        });
-                        break;
-                    }
-                    // falls through
-
-                case SyntaxKind.ModuleBlock: {
-                    const openBrace = findChildOfKind(n, SyntaxKind.OpenBraceToken, sourceFile);
-                    const closeBrace = findChildOfKind(n, SyntaxKind.CloseBraceToken, sourceFile);
-                    addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n), /*useFullStart*/ true);
-                    break;
-                }
-                case SyntaxKind.ClassDeclaration:
-                case SyntaxKind.InterfaceDeclaration:
-                case SyntaxKind.EnumDeclaration:
-                case SyntaxKind.CaseBlock: {
-                    const openBrace = findChildOfKind(n, SyntaxKind.OpenBraceToken, sourceFile);
-                    const closeBrace = findChildOfKind(n, SyntaxKind.CloseBraceToken, sourceFile);
-                    addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n), /*useFullStart*/ true);
-                    break;
+            if (!result[1]) {
+                const span = createTextSpanFromBounds(sourceFile.text.indexOf("//", currentLineStart), lineEnd);
+                regions.push(createOutliningSpan(span, span, /*autoCollapse*/ false, result[2] || "#region"));
+            }
+            else {
+                const region = regions.pop();
+                if (region) {
+                    region.textSpan.length = lineEnd - region.textSpan.start;
+                    region.hintSpan.length = lineEnd - region.textSpan.start;
+                    out.push(region);
                 }
-                // If the block has no leading keywords and is inside an array literal,
-                // we only want to collapse the span of the block.
-                // Otherwise, the collapsed section will include the end of the previous line.
-                case SyntaxKind.ObjectLiteralExpression:
-                    const openBrace = findChildOfKind(n, SyntaxKind.OpenBraceToken, sourceFile);
-                    const closeBrace = findChildOfKind(n, SyntaxKind.CloseBraceToken, sourceFile);
-                    addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n), /*useFullStart*/ !isArrayLiteralExpression(n.parent));
-                    break;
-                case SyntaxKind.ArrayLiteralExpression:
-                    const openBracket = findChildOfKind(n, SyntaxKind.OpenBracketToken, sourceFile);
-                    const closeBracket = findChildOfKind(n, SyntaxKind.CloseBracketToken, sourceFile);
-                    addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n), /*useFullStart*/ !isArrayLiteralExpression(n.parent));
-                    break;
             }
-            depth++;
-            forEachChild(n, walk);
-            depth--;
         }
     }
+
+    function addOutliningForLeadingCommentsForNode(n: Node, sourceFile: SourceFile, cancellationToken: CancellationToken, out: Push<OutliningSpan>): void {
+        const comments = getLeadingCommentRangesOfNode(n, sourceFile);
+        if (!comments) return;
+        let firstSingleLineCommentStart = -1;
+        let lastSingleLineCommentEnd = -1;
+        let singleLineCommentCount = 0;
+        for (const { kind, pos, end } of comments) {
+            cancellationToken.throwIfCancellationRequested();
+            switch (kind) {
+                case SyntaxKind.SingleLineCommentTrivia:
+                    // For single line comments, combine consecutive ones (2 or more) into
+                    // a single span from the start of the first till the end of the last
+                    if (singleLineCommentCount === 0) {
+                        firstSingleLineCommentStart = pos;
+                    }
+                    lastSingleLineCommentEnd = end;
+                    singleLineCommentCount++;
+                    break;
+                case SyntaxKind.MultiLineCommentTrivia:
+                    combineAndAddMultipleSingleLineComments();
+                    out.push(createOutliningSpanFromBounds(pos, end));
+                    singleLineCommentCount = 0;
+                    break;
+                default:
+                    Debug.assertNever(kind);
+            }
+        }
+        combineAndAddMultipleSingleLineComments();
+
+        function combineAndAddMultipleSingleLineComments(): void {
+            // Only outline spans of two or more consecutive single line comments
+            if (singleLineCommentCount > 1) {
+                out.push(createOutliningSpanFromBounds(firstSingleLineCommentStart, lastSingleLineCommentEnd));
+            }
+        }
+    }
+
+    function createOutliningSpanFromBounds(pos: number, end: number): OutliningSpan {
+        return createOutliningSpan(createTextSpanFromBounds(pos, end));
+    }
+
+    function getOutliningSpanForNode(n: Node, sourceFile: SourceFile): OutliningSpan | undefined {
+        switch (n.kind) {
+            case SyntaxKind.Block:
+                if (isFunctionBlock(n)) {
+                    return spanForNode(n.parent, /*autoCollapse*/ n.parent.kind !== SyntaxKind.ArrowFunction);
+                }
+                // Check if the block is standalone, or 'attached' to some parent statement.
+                // If the latter, we want to collapse the block, but consider its hint span
+                // to be the entire span of the parent.
+                switch (n.parent.kind) {
+                    case SyntaxKind.DoStatement:
+                    case SyntaxKind.ForInStatement:
+                    case SyntaxKind.ForOfStatement:
+                    case SyntaxKind.ForStatement:
+                    case SyntaxKind.IfStatement:
+                    case SyntaxKind.WhileStatement:
+                    case SyntaxKind.WithStatement:
+                    case SyntaxKind.CatchClause:
+                        return spanForNode(n.parent);
+                    case SyntaxKind.TryStatement:
+                        // Could be the try-block, or the finally-block.
+                        const tryStatement = <TryStatement>n.parent;
+                        if (tryStatement.tryBlock === n) {
+                            return spanForNode(n.parent);
+                        }
+                        else if (tryStatement.finallyBlock === n) {
+                            return spanForNode(findChildOfKind(tryStatement, SyntaxKind.FinallyKeyword, sourceFile)!);
+                        }
+                        // falls through
+                    default:
+                        // Block was a standalone block.  In this case we want to only collapse
+                        // the span of the block, independent of any parent span.
+                        return createOutliningSpan(createTextSpanFromNode(n, sourceFile));
+                }
+            case SyntaxKind.ModuleBlock:
+                return spanForNode(n.parent);
+            case SyntaxKind.ClassDeclaration:
+            case SyntaxKind.InterfaceDeclaration:
+            case SyntaxKind.EnumDeclaration:
+            case SyntaxKind.CaseBlock:
+                return spanForNode(n);
+            case SyntaxKind.ObjectLiteralExpression:
+                return spanForObjectOrArrayLiteral(n);
+            case SyntaxKind.ArrayLiteralExpression:
+                return spanForObjectOrArrayLiteral(n, SyntaxKind.OpenBracketToken);
+        }
+
+        function spanForObjectOrArrayLiteral(node: Node, open: SyntaxKind.OpenBraceToken | SyntaxKind.OpenBracketToken = SyntaxKind.OpenBraceToken): OutliningSpan | undefined {
+            // If the block has no leading keywords and is inside an array literal,
+            // we only want to collapse the span of the block.
+            // Otherwise, the collapsed section will include the end of the previous line.
+            return spanForNode(node, /*autoCollapse*/ false, /*useFullStart*/ !isArrayLiteralExpression(node.parent), open);
+        }
+
+        function spanForNode(hintSpanNode: Node, autoCollapse = false, useFullStart = true, open: SyntaxKind.OpenBraceToken | SyntaxKind.OpenBracketToken = SyntaxKind.OpenBraceToken): OutliningSpan | undefined {
+            const openToken = findChildOfKind(n, open, sourceFile);
+            const close = open === SyntaxKind.OpenBraceToken ? SyntaxKind.CloseBraceToken : SyntaxKind.CloseBracketToken;
+            const closeToken = findChildOfKind(n, close, sourceFile);
+            if (!openToken || !closeToken) {
+                return undefined;
+            }
+            const textSpan = createTextSpanFromBounds(useFullStart ? openToken.getFullStart() : openToken.getStart(sourceFile), closeToken.getEnd());
+            return createOutliningSpan(textSpan, createTextSpanFromNode(hintSpanNode, sourceFile), autoCollapse);
+        }
+    }
+
+    function createOutliningSpan(textSpan: TextSpan, hintSpan: TextSpan = textSpan, autoCollapse = false, bannerText = "..."): OutliningSpan {
+        return { textSpan, hintSpan, bannerText, autoCollapse };
+    }
 }
\ No newline at end of file
diff --git a/src/services/services.ts b/src/services/services.ts
index f479a47f398..24679e6a167 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -473,6 +473,12 @@ namespace ts {
         getNonNullableType(): Type {
             return this.checker.getNonNullableType(this);
         }
+        getConstraint(): Type | undefined {
+            return this.checker.getBaseConstraintOfType(this);
+        }
+        getDefault(): Type | undefined {
+            return this.checker.getDefaultFromTypeParameter(this);
+        }
     }
 
     class SignatureObject implements Signature {
diff --git a/src/services/types.ts b/src/services/types.ts
index 28de0566a50..e74b830cc45 100644
--- a/src/services/types.ts
+++ b/src/services/types.ts
@@ -50,6 +50,8 @@ namespace ts {
         getNumberIndexType(): Type | undefined;
         getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
+        getConstraint(): Type | undefined;
+        getDefault(): Type | undefined;
     }
 
     export interface Signature {
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 3837763cee5..e76fcd93492 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -1329,13 +1329,17 @@ namespace ts {
         return getTokenAtPosition(sourceFile, declaration.members.pos - 1, /*includeJsDocComment*/ false);
     }
 
-    export function getSourceFileImportLocation(node: SourceFile) {
-        // For a source file, it is possible there are detached comments we should not skip
-        const text = node.text;
-        const textLength = text.length;
-        let ranges = getLeadingCommentRanges(text, 0);
-        if (!ranges) return 0;
+    export function getSourceFileImportLocation({ text }: SourceFile) {
+        const shebang = getShebang(text);
         let position = 0;
+        if (shebang !== undefined) {
+            position = shebang.length;
+            advancePastLineBreak();
+        }
+
+        // For a source file, it is possible there are detached comments we should not skip
+        let ranges = getLeadingCommentRanges(text, position);
+        if (!ranges) return position;
         // However we should still skip a pinned comment at the top
         if (ranges.length && ranges[0].kind === SyntaxKind.MultiLineCommentTrivia && isPinnedComment(text, ranges[0])) {
             position = ranges[0].end;
@@ -1344,7 +1348,7 @@ namespace ts {
         }
         // As well as any triple slash references
         for (const range of ranges) {
-            if (range.kind === SyntaxKind.SingleLineCommentTrivia && isRecognizedTripleSlashComment(node.text, range.pos, range.end)) {
+            if (range.kind === SyntaxKind.SingleLineCommentTrivia && isRecognizedTripleSlashComment(text, range.pos, range.end)) {
                 position = range.end;
                 advancePastLineBreak();
                 continue;
@@ -1354,12 +1358,12 @@ namespace ts {
         return position;
 
         function advancePastLineBreak() {
-            if (position < textLength) {
+            if (position < text.length) {
                 const charCode = text.charCodeAt(position);
                 if (isLineBreak(charCode)) {
                     position++;
 
-                    if (position < textLength && charCode === CharacterCodes.carriageReturn && text.charCodeAt(position) === CharacterCodes.lineFeed) {
+                    if (position < text.length && charCode === CharacterCodes.carriageReturn && text.charCodeAt(position) === CharacterCodes.lineFeed) {
                         position++;
                     }
                 }
diff --git a/tests/baselines/reference/api/tsserverlibrary.d.ts b/tests/baselines/reference/api/tsserverlibrary.d.ts
index f3feec89acc..bd8bab1e3b8 100644
--- a/tests/baselines/reference/api/tsserverlibrary.d.ts
+++ b/tests/baselines/reference/api/tsserverlibrary.d.ts
@@ -1783,6 +1783,8 @@ declare namespace ts {
         getApparentType(type: Type): Type;
         getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
         getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
+        getBaseConstraintOfType(type: Type): Type | undefined;
+        getDefaultFromTypeParameter(type: Type): Type | undefined;
     }
     enum NodeBuilderFlags {
         None = 0,
@@ -2119,9 +2121,6 @@ declare namespace ts {
     interface TypeVariable extends Type {
     }
     interface TypeParameter extends TypeVariable {
-        /** Retrieve using getConstraintFromTypeParameter */
-        constraint: Type;
-        default?: Type;
     }
     interface IndexedAccessType extends TypeVariable {
         objectType: Type;
@@ -3843,6 +3842,8 @@ declare namespace ts {
         getNumberIndexType(): Type | undefined;
         getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
+        getConstraint(): Type | undefined;
+        getDefault(): Type | undefined;
     }
     interface Signature {
         getDeclaration(): SignatureDeclaration;
@@ -4586,9 +4587,9 @@ declare namespace ts {
          * @param compilationSettings Some compilation settings like target affects the
          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
          * multiple copies of the same file for different compilation settings.
-         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * @param scriptSnapshot Text of the file. Only used if the file was not found
          * in the registry and a new one was created.
-         * @parm version Current version of the file. Only used if the file was not found
+         * @param version Current version of the file. Only used if the file was not found
          * in the registry and a new one was created.
          */
         acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
@@ -4716,7 +4717,7 @@ declare namespace ts.server {
     interface TypesRegistryRequest {
         readonly kind: "typesRegistry";
     }
-    interface InstallPackageRequest {
+    interface InstallPackageRequest extends TypingInstallerRequestWithProjectName {
         readonly kind: "installPackage";
         readonly fileName: Path;
         readonly packageName: string;
@@ -4724,13 +4725,18 @@ declare namespace ts.server {
     }
     type ActionSet = "action::set";
     type ActionInvalidate = "action::invalidate";
+    type ActionPackageInstalled = "action::packageInstalled";
     type EventTypesRegistry = "event::typesRegistry";
-    type EventPackageInstalled = "event::packageInstalled";
     type EventBeginInstallTypes = "event::beginInstallTypes";
     type EventEndInstallTypes = "event::endInstallTypes";
     type EventInitializationFailed = "event::initializationFailed";
     interface TypingInstallerResponse {
-        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | EventPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
+        readonly kind: ActionSet | ActionInvalidate | EventTypesRegistry | ActionPackageInstalled | EventBeginInstallTypes | EventEndInstallTypes | EventInitializationFailed;
+    }
+    interface PackageInstalledResponse extends ProjectResponse {
+        readonly kind: ActionPackageInstalled;
+        readonly success: boolean;
+        readonly message: string;
     }
     interface InitializationFailedResponse extends TypingInstallerResponse {
         readonly kind: EventInitializationFailed;
@@ -4766,8 +4772,8 @@ declare namespace ts.server {
 declare namespace ts.server {
     const ActionSet: ActionSet;
     const ActionInvalidate: ActionInvalidate;
+    const ActionPackageInstalled: ActionPackageInstalled;
     const EventTypesRegistry: EventTypesRegistry;
-    const EventPackageInstalled: EventPackageInstalled;
     const EventBeginInstallTypes: EventBeginInstallTypes;
     const EventEndInstallTypes: EventEndInstallTypes;
     const EventInitializationFailed: EventInitializationFailed;
@@ -6930,7 +6936,7 @@ declare namespace ts.server {
     type CommandNames = protocol.CommandTypes;
     const CommandNames: any;
     function formatMessage<T extends protocol.Message>(msg: T, logger: server.Logger, byteLength: (s: string, encoding: string) => number, newLine: string): string;
-    type Event = <T>(body: T, eventName: string) => void;
+    type Event = <T extends object>(body: T, eventName: string) => void;
     interface EventSender {
         event: Event;
     }
@@ -6973,7 +6979,7 @@ declare namespace ts.server {
         private projectsUpdatedInBackgroundEvent(openFiles);
         logError(err: Error, cmd: string): void;
         send(msg: protocol.Message): void;
-        event<T>(body: T, eventName: string): void;
+        event<T extends object>(body: T, eventName: string): void;
         /** @deprecated */
         output(info: any, cmdName: string, reqSeq?: number, errorMsg?: string): void;
         private doOutput(info, cmdName, reqSeq, success, message?);
@@ -7125,12 +7131,13 @@ declare namespace ts.server {
     }
 }
 declare namespace ts.server {
-    interface InstallPackageOptionsWithProjectRootPath extends InstallPackageOptions {
+    interface InstallPackageOptionsWithProject extends InstallPackageOptions {
+        projectName: string;
         projectRootPath: Path;
     }
     interface ITypingsInstaller {
         isKnownTypesPackageName(name: string): boolean;
-        installPackage(options: InstallPackageOptionsWithProjectRootPath): Promise<ApplyCodeActionCommandResult>;
+        installPackage(options: InstallPackageOptionsWithProject): Promise<ApplyCodeActionCommandResult>;
         enqueueInstallTypingsRequest(p: Project, typeAcquisition: TypeAcquisition, unresolvedImports: SortedReadonlyArray<string>): void;
         attach(projectService: ProjectService): void;
         onProjectClosed(p: Project): void;
@@ -7142,7 +7149,7 @@ declare namespace ts.server {
         private readonly perProjectCache;
         constructor(installer: ITypingsInstaller);
         isKnownTypesPackageName(name: string): boolean;
-        installPackage(options: InstallPackageOptionsWithProjectRootPath): Promise<ApplyCodeActionCommandResult>;
+        installPackage(options: InstallPackageOptionsWithProject): Promise<ApplyCodeActionCommandResult>;
         getTypingsForProject(project: Project, unresolvedImports: SortedReadonlyArray<string>, forceRefresh: boolean): SortedReadonlyArray<string>;
         updateTypingsForProject(projectName: string, compilerOptions: CompilerOptions, typeAcquisition: TypeAcquisition, unresolvedImports: SortedReadonlyArray<string>, newTypings: string[]): void;
         deleteTypingsForProject(projectName: string): void;
@@ -7566,7 +7573,7 @@ declare namespace ts.server {
         private createWatcherLog(watchType, project);
         toPath(fileName: string): Path;
         private loadTypesMap();
-        updateTypingsForProject(response: SetTypings | InvalidateCachedTypings): void;
+        updateTypingsForProject(response: SetTypings | InvalidateCachedTypings | PackageInstalledResponse): void;
         private delayInferredProjectsRefresh();
         private delayUpdateProjectGraph(project);
         private sendProjectsUpdatedInBackgroundEvent();
diff --git a/tests/baselines/reference/api/typescript.d.ts b/tests/baselines/reference/api/typescript.d.ts
index 1cd6fc30ef4..147b62e63c1 100644
--- a/tests/baselines/reference/api/typescript.d.ts
+++ b/tests/baselines/reference/api/typescript.d.ts
@@ -1783,6 +1783,8 @@ declare namespace ts {
         getApparentType(type: Type): Type;
         getSuggestionForNonexistentProperty(node: Identifier, containingType: Type): string | undefined;
         getSuggestionForNonexistentSymbol(location: Node, name: string, meaning: SymbolFlags): string | undefined;
+        getBaseConstraintOfType(type: Type): Type | undefined;
+        getDefaultFromTypeParameter(type: Type): Type | undefined;
     }
     enum NodeBuilderFlags {
         None = 0,
@@ -2119,9 +2121,6 @@ declare namespace ts {
     interface TypeVariable extends Type {
     }
     interface TypeParameter extends TypeVariable {
-        /** Retrieve using getConstraintFromTypeParameter */
-        constraint: Type;
-        default?: Type;
     }
     interface IndexedAccessType extends TypeVariable {
         objectType: Type;
@@ -3843,6 +3842,8 @@ declare namespace ts {
         getNumberIndexType(): Type | undefined;
         getBaseTypes(): BaseType[] | undefined;
         getNonNullableType(): Type;
+        getConstraint(): Type | undefined;
+        getDefault(): Type | undefined;
     }
     interface Signature {
         getDeclaration(): SignatureDeclaration;
@@ -4586,9 +4587,9 @@ declare namespace ts {
          * @param compilationSettings Some compilation settings like target affects the
          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
          * multiple copies of the same file for different compilation settings.
-         * @parm scriptSnapshot Text of the file. Only used if the file was not found
+         * @param scriptSnapshot Text of the file. Only used if the file was not found
          * in the registry and a new one was created.
-         * @parm version Current version of the file. Only used if the file was not found
+         * @param version Current version of the file. Only used if the file was not found
          * in the registry and a new one was created.
          */
         acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
diff --git a/tests/baselines/reference/destructuredDeclarationEmit.js b/tests/baselines/reference/destructuredDeclarationEmit.js
new file mode 100644
index 00000000000..d4197652581
--- /dev/null
+++ b/tests/baselines/reference/destructuredDeclarationEmit.js
@@ -0,0 +1,77 @@
+//// [tests/cases/compiler/destructuredDeclarationEmit.ts] ////
+
+//// [foo.ts]
+const foo = { bar: 'hello', bat: 'world', bam: { bork: { bar: 'a', baz: 'b' } } };
+const arr: [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]] = [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]];
+export { foo, arr };
+//// [index.ts]
+import { foo, arr } from './foo';
+export { foo, arr };
+
+const { bar: baz, bat, bam: { bork: { bar: ibar, baz: ibaz } } } = foo;
+export { baz, ibaz };
+
+const [ , one, , [, bee, , [, {sec} ]]] = arr;
+export { one, bee, sec };
+
+const getFoo = () => ({
+    foo: 'foo'
+});
+
+const { foo: foo2 } = getFoo();
+export { foo2 };
+
+
+//// [foo.js]
+"use strict";
+exports.__esModule = true;
+var foo = { bar: 'hello', bat: 'world', bam: { bork: { bar: 'a', baz: 'b' } } };
+exports.foo = foo;
+var arr = [0, 1, 2, ['a', 'b', 'c', [{ def: 'def' }, { sec: 'sec' }]]];
+exports.arr = arr;
+//// [index.js]
+"use strict";
+exports.__esModule = true;
+var foo_1 = require("./foo");
+exports.foo = foo_1.foo;
+exports.arr = foo_1.arr;
+var baz = foo_1.foo.bar, bat = foo_1.foo.bat, _a = foo_1.foo.bam.bork, ibar = _a.bar, ibaz = _a.baz;
+exports.baz = baz;
+exports.ibaz = ibaz;
+var one = foo_1.arr[1], _b = foo_1.arr[3], bee = _b[1], _c = _b[3], sec = _c[1].sec;
+exports.one = one;
+exports.bee = bee;
+exports.sec = sec;
+var getFoo = function () { return ({
+    foo: 'foo'
+}); };
+var foo2 = getFoo().foo;
+exports.foo2 = foo2;
+
+
+//// [foo.d.ts]
+declare const foo: {
+    bar: string;
+    bat: string;
+    bam: {
+        bork: {
+            bar: string;
+            baz: string;
+        };
+    };
+};
+declare const arr: [0, 1, 2, ['a', 'b', 'c', [{
+    def: 'def';
+}, {
+    sec: 'sec';
+}]]];
+export { foo, arr };
+//// [index.d.ts]
+import { foo, arr } from './foo';
+export { foo, arr };
+declare const baz: string, ibaz: string;
+export { baz, ibaz };
+declare const one: 1, bee: "b", sec: "sec";
+export { one, bee, sec };
+declare const foo2: string;
+export { foo2 };
diff --git a/tests/baselines/reference/destructuredDeclarationEmit.symbols b/tests/baselines/reference/destructuredDeclarationEmit.symbols
new file mode 100644
index 00000000000..daeed5befd7
--- /dev/null
+++ b/tests/baselines/reference/destructuredDeclarationEmit.symbols
@@ -0,0 +1,73 @@
+=== tests/cases/compiler/foo.ts ===
+const foo = { bar: 'hello', bat: 'world', bam: { bork: { bar: 'a', baz: 'b' } } };
+>foo : Symbol(foo, Decl(foo.ts, 0, 5))
+>bar : Symbol(bar, Decl(foo.ts, 0, 13))
+>bat : Symbol(bat, Decl(foo.ts, 0, 27))
+>bam : Symbol(bam, Decl(foo.ts, 0, 41))
+>bork : Symbol(bork, Decl(foo.ts, 0, 48))
+>bar : Symbol(bar, Decl(foo.ts, 0, 56))
+>baz : Symbol(baz, Decl(foo.ts, 0, 66))
+
+const arr: [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]] = [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]];
+>arr : Symbol(arr, Decl(foo.ts, 1, 5))
+>def : Symbol(def, Decl(foo.ts, 1, 39))
+>sec : Symbol(sec, Decl(foo.ts, 1, 53))
+>def : Symbol(def, Decl(foo.ts, 1, 98))
+>sec : Symbol(sec, Decl(foo.ts, 1, 112))
+
+export { foo, arr };
+>foo : Symbol(foo, Decl(foo.ts, 2, 8))
+>arr : Symbol(arr, Decl(foo.ts, 2, 13))
+
+=== tests/cases/compiler/index.ts ===
+import { foo, arr } from './foo';
+>foo : Symbol(foo, Decl(index.ts, 0, 8))
+>arr : Symbol(arr, Decl(index.ts, 0, 13))
+
+export { foo, arr };
+>foo : Symbol(foo, Decl(index.ts, 1, 8))
+>arr : Symbol(arr, Decl(index.ts, 1, 13))
+
+const { bar: baz, bat, bam: { bork: { bar: ibar, baz: ibaz } } } = foo;
+>bar : Symbol(bar, Decl(foo.ts, 0, 13))
+>baz : Symbol(baz, Decl(index.ts, 3, 7))
+>bat : Symbol(bat, Decl(index.ts, 3, 17))
+>bam : Symbol(bam, Decl(foo.ts, 0, 41))
+>bork : Symbol(bork, Decl(foo.ts, 0, 48))
+>bar : Symbol(bar, Decl(foo.ts, 0, 56))
+>ibar : Symbol(ibar, Decl(index.ts, 3, 37))
+>baz : Symbol(baz, Decl(foo.ts, 0, 66))
+>ibaz : Symbol(ibaz, Decl(index.ts, 3, 48))
+>foo : Symbol(foo, Decl(index.ts, 0, 8))
+
+export { baz, ibaz };
+>baz : Symbol(baz, Decl(index.ts, 4, 8))
+>ibaz : Symbol(ibaz, Decl(index.ts, 4, 13))
+
+const [ , one, , [, bee, , [, {sec} ]]] = arr;
+>one : Symbol(one, Decl(index.ts, 6, 9))
+>bee : Symbol(bee, Decl(index.ts, 6, 19))
+>sec : Symbol(sec, Decl(index.ts, 6, 31))
+>arr : Symbol(arr, Decl(index.ts, 0, 13))
+
+export { one, bee, sec };
+>one : Symbol(one, Decl(index.ts, 7, 8))
+>bee : Symbol(bee, Decl(index.ts, 7, 13))
+>sec : Symbol(sec, Decl(index.ts, 7, 18))
+
+const getFoo = () => ({
+>getFoo : Symbol(getFoo, Decl(index.ts, 9, 5))
+
+    foo: 'foo'
+>foo : Symbol(foo, Decl(index.ts, 9, 23))
+
+});
+
+const { foo: foo2 } = getFoo();
+>foo : Symbol(foo, Decl(index.ts, 9, 23))
+>foo2 : Symbol(foo2, Decl(index.ts, 13, 7))
+>getFoo : Symbol(getFoo, Decl(index.ts, 9, 5))
+
+export { foo2 };
+>foo2 : Symbol(foo2, Decl(index.ts, 14, 8))
+
diff --git a/tests/baselines/reference/destructuredDeclarationEmit.types b/tests/baselines/reference/destructuredDeclarationEmit.types
new file mode 100644
index 00000000000..94845f94885
--- /dev/null
+++ b/tests/baselines/reference/destructuredDeclarationEmit.types
@@ -0,0 +1,103 @@
+=== tests/cases/compiler/foo.ts ===
+const foo = { bar: 'hello', bat: 'world', bam: { bork: { bar: 'a', baz: 'b' } } };
+>foo : { bar: string; bat: string; bam: { bork: { bar: string; baz: string; }; }; }
+>{ bar: 'hello', bat: 'world', bam: { bork: { bar: 'a', baz: 'b' } } } : { bar: string; bat: string; bam: { bork: { bar: string; baz: string; }; }; }
+>bar : string
+>'hello' : "hello"
+>bat : string
+>'world' : "world"
+>bam : { bork: { bar: string; baz: string; }; }
+>{ bork: { bar: 'a', baz: 'b' } } : { bork: { bar: string; baz: string; }; }
+>bork : { bar: string; baz: string; }
+>{ bar: 'a', baz: 'b' } : { bar: string; baz: string; }
+>bar : string
+>'a' : "a"
+>baz : string
+>'b' : "b"
+
+const arr: [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]] = [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]];
+>arr : [0, 1, 2, ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]]
+>def : "def"
+>sec : "sec"
+>[0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]] : [0, 1, 2, ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]]
+>0 : 0
+>1 : 1
+>2 : 2
+>['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]] : ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]
+>'a' : "a"
+>'b' : "b"
+>'c' : "c"
+>[{def: 'def'}, {sec: 'sec'}] : [{ def: "def"; }, { sec: "sec"; }]
+>{def: 'def'} : { def: "def"; }
+>def : string
+>'def' : "def"
+>{sec: 'sec'} : { sec: "sec"; }
+>sec : string
+>'sec' : "sec"
+
+export { foo, arr };
+>foo : { bar: string; bat: string; bam: { bork: { bar: string; baz: string; }; }; }
+>arr : [0, 1, 2, ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]]
+
+=== tests/cases/compiler/index.ts ===
+import { foo, arr } from './foo';
+>foo : { bar: string; bat: string; bam: { bork: { bar: string; baz: string; }; }; }
+>arr : [0, 1, 2, ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]]
+
+export { foo, arr };
+>foo : { bar: string; bat: string; bam: { bork: { bar: string; baz: string; }; }; }
+>arr : [0, 1, 2, ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]]
+
+const { bar: baz, bat, bam: { bork: { bar: ibar, baz: ibaz } } } = foo;
+>bar : any
+>baz : string
+>bat : string
+>bam : any
+>bork : any
+>bar : any
+>ibar : string
+>baz : any
+>ibaz : string
+>foo : { bar: string; bat: string; bam: { bork: { bar: string; baz: string; }; }; }
+
+export { baz, ibaz };
+>baz : string
+>ibaz : string
+
+const [ , one, , [, bee, , [, {sec} ]]] = arr;
+> : undefined
+>one : 1
+> : undefined
+> : undefined
+>bee : "b"
+> : undefined
+> : undefined
+>sec : "sec"
+>arr : [0, 1, 2, ["a", "b", "c", [{ def: "def"; }, { sec: "sec"; }]]]
+
+export { one, bee, sec };
+>one : 1
+>bee : "b"
+>sec : "sec"
+
+const getFoo = () => ({
+>getFoo : () => { foo: string; }
+>() => ({    foo: 'foo'}) : () => { foo: string; }
+>({    foo: 'foo'}) : { foo: string; }
+>{    foo: 'foo'} : { foo: string; }
+
+    foo: 'foo'
+>foo : string
+>'foo' : "foo"
+
+});
+
+const { foo: foo2 } = getFoo();
+>foo : any
+>foo2 : string
+>getFoo() : { foo: string; }
+>getFoo : () => { foo: string; }
+
+export { foo2 };
+>foo2 : string
+
diff --git a/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.js b/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.js
new file mode 100644
index 00000000000..8a6a602d6d7
--- /dev/null
+++ b/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.js
@@ -0,0 +1,11 @@
+//// [initializedParameterBeforeNonoptionalNotOptional.ts]
+export declare function foo({a}?: {
+    a?: string;
+}): void;
+export declare function foo2({a}: {
+    a?: string | undefined;
+} | undefined, b: string): void;
+
+//// [initializedParameterBeforeNonoptionalNotOptional.js]
+"use strict";
+exports.__esModule = true;
diff --git a/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.symbols b/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.symbols
new file mode 100644
index 00000000000..9e91e2bd3aa
--- /dev/null
+++ b/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.symbols
@@ -0,0 +1,34 @@
+=== tests/cases/compiler/index.d.ts ===
+export declare function foo({a}?: {
+>foo : Symbol(foo, Decl(index.d.ts, 0, 0))
+>a : Symbol(a, Decl(index.d.ts, 0, 29))
+
+    a?: string;
+>a : Symbol(a, Decl(index.d.ts, 0, 35))
+
+}): void;
+export declare function foo2({a}: {
+>foo2 : Symbol(foo2, Decl(index.d.ts, 2, 9))
+>a : Symbol(a, Decl(index.d.ts, 3, 30))
+
+    a?: string | undefined;
+>a : Symbol(a, Decl(index.d.ts, 3, 35))
+
+} | undefined, b: string): void;
+>b : Symbol(b, Decl(index.d.ts, 5, 14))
+
+export declare function foo3({a, b: {c}}: {
+>foo3 : Symbol(foo3, Decl(index.d.ts, 5, 32))
+>a : Symbol(a, Decl(index.d.ts, 6, 30))
+>c : Symbol(c, Decl(index.d.ts, 6, 37))
+
+    a?: string | undefined;
+>a : Symbol(a, Decl(index.d.ts, 6, 43))
+
+    b?: {c?: string | undefined;} | undefined;
+>b : Symbol(b, Decl(index.d.ts, 7, 27))
+>c : Symbol(c, Decl(index.d.ts, 8, 9))
+
+} | undefined, b: string): void;
+>b : Symbol(b, Decl(index.d.ts, 9, 14))
+
diff --git a/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.types b/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.types
new file mode 100644
index 00000000000..798b5268337
--- /dev/null
+++ b/tests/baselines/reference/initializedParameterBeforeNonoptionalNotOptional.types
@@ -0,0 +1,35 @@
+=== tests/cases/compiler/index.d.ts ===
+export declare function foo({a}?: {
+>foo : ({ a }?: { a?: string | undefined; } | undefined) => void
+>a : string | undefined
+
+    a?: string;
+>a : string | undefined
+
+}): void;
+export declare function foo2({a}: {
+>foo2 : ({ a }: { a?: string | undefined; } | undefined, b: string) => void
+>a : string | undefined
+
+    a?: string | undefined;
+>a : string | undefined
+
+} | undefined, b: string): void;
+>b : string
+
+export declare function foo3({a, b: {c}}: {
+>foo3 : ({ a, b: { c } }: { a?: string | undefined; b?: { c?: string | undefined; } | undefined; } | undefined, b: string) => void
+>a : string | undefined
+>b : any
+>c : string | undefined
+
+    a?: string | undefined;
+>a : string | undefined
+
+    b?: {c?: string | undefined;} | undefined;
+>b : { c?: string | undefined; } | undefined
+>c : string | undefined
+
+} | undefined, b: string): void;
+>b : string
+
diff --git a/tests/baselines/reference/jsdocIllegalTags.errors.txt b/tests/baselines/reference/jsdocIllegalTags.errors.txt
new file mode 100644
index 00000000000..485d01b12d9
--- /dev/null
+++ b/tests/baselines/reference/jsdocIllegalTags.errors.txt
@@ -0,0 +1,18 @@
+/a.js(2,19): error TS1092: Type parameters cannot appear on a constructor declaration.
+/a.js(6,18): error TS1093: Type annotation cannot appear on a constructor declaration.
+
+
+==== /a.js (2 errors) ====
+    class C {
+        /** @template T */
+                      ~
+!!! error TS1092: Type parameters cannot appear on a constructor declaration.
+        constructor() { }
+    }
+    class D {
+        /** @return {number} */
+                     ~~~~~~
+!!! error TS1093: Type annotation cannot appear on a constructor declaration.
+        constructor() {}
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/jsdocIllegalTags.symbols b/tests/baselines/reference/jsdocIllegalTags.symbols
new file mode 100644
index 00000000000..615bdc2facd
--- /dev/null
+++ b/tests/baselines/reference/jsdocIllegalTags.symbols
@@ -0,0 +1,14 @@
+=== /a.js ===
+class C {
+>C : Symbol(C, Decl(a.js, 0, 0))
+
+    /** @template T */
+    constructor() { }
+}
+class D {
+>D : Symbol(D, Decl(a.js, 3, 1))
+
+    /** @return {number} */
+    constructor() {}
+}
+
diff --git a/tests/baselines/reference/jsdocIllegalTags.types b/tests/baselines/reference/jsdocIllegalTags.types
new file mode 100644
index 00000000000..c40302f11d3
--- /dev/null
+++ b/tests/baselines/reference/jsdocIllegalTags.types
@@ -0,0 +1,14 @@
+=== /a.js ===
+class C {
+>C : C
+
+    /** @template T */
+    constructor() { }
+}
+class D {
+>D : D
+
+    /** @return {number} */
+    constructor() {}
+}
+
diff --git a/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.js b/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.js
new file mode 100644
index 00000000000..567cb71cafb
--- /dev/null
+++ b/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.js
@@ -0,0 +1,23 @@
+//// [mutuallyRecursiveInterfaceDeclaration.ts]
+interface A {
+    b: B
+}
+
+interface B {
+    a: A
+}
+export {A, B}
+
+//// [mutuallyRecursiveInterfaceDeclaration.js]
+"use strict";
+exports.__esModule = true;
+
+
+//// [mutuallyRecursiveInterfaceDeclaration.d.ts]
+interface A {
+    b: B;
+}
+interface B {
+    a: A;
+}
+export { A, B };
diff --git a/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.symbols b/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.symbols
new file mode 100644
index 00000000000..b0ac456859c
--- /dev/null
+++ b/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/compiler/mutuallyRecursiveInterfaceDeclaration.ts ===
+interface A {
+>A : Symbol(A, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 0, 0))
+
+    b: B
+>b : Symbol(A.b, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 0, 13))
+>B : Symbol(B, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 2, 1))
+}
+
+interface B {
+>B : Symbol(B, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 2, 1))
+
+    a: A
+>a : Symbol(B.a, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 4, 13))
+>A : Symbol(A, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 0, 0))
+}
+export {A, B}
+>A : Symbol(A, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 7, 8))
+>B : Symbol(B, Decl(mutuallyRecursiveInterfaceDeclaration.ts, 7, 10))
+
diff --git a/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.types b/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.types
new file mode 100644
index 00000000000..807687160b2
--- /dev/null
+++ b/tests/baselines/reference/mutuallyRecursiveInterfaceDeclaration.types
@@ -0,0 +1,20 @@
+=== tests/cases/compiler/mutuallyRecursiveInterfaceDeclaration.ts ===
+interface A {
+>A : A
+
+    b: B
+>b : B
+>B : B
+}
+
+interface B {
+>B : B
+
+    a: A
+>a : A
+>A : A
+}
+export {A, B}
+>A : any
+>B : any
+
diff --git a/tests/baselines/reference/parenthesizedAsyncArrowFunction.js b/tests/baselines/reference/parenthesizedAsyncArrowFunction.js
new file mode 100644
index 00000000000..1f2cbc722e0
--- /dev/null
+++ b/tests/baselines/reference/parenthesizedAsyncArrowFunction.js
@@ -0,0 +1,47 @@
+//// [parenthesizedAsyncArrowFunction.ts]
+// Repro from #20096
+
+let foo = (async bar => bar);
+
+
+//// [parenthesizedAsyncArrowFunction.js]
+// Repro from #20096
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
+var __generator = (this && this.__generator) || function (thisArg, body) {
+    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
+    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
+    function verb(n) { return function (v) { return step([n, v]); }; }
+    function step(op) {
+        if (f) throw new TypeError("Generator is already executing.");
+        while (_) try {
+            if (f = 1, y && (t = y[op[0] & 2 ? "return" : op[0] ? "throw" : "next"]) && !(t = t.call(y, op[1])).done) return t;
+            if (y = 0, t) op = [0, t.value];
+            switch (op[0]) {
+                case 0: case 1: t = op; break;
+                case 4: _.label++; return { value: op[1], done: false };
+                case 5: _.label++; y = op[1]; op = [0]; continue;
+                case 7: op = _.ops.pop(); _.trys.pop(); continue;
+                default:
+                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
+                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
+                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
+                    if (t && _.label < t[2]) { _.label = t[2]; _.ops.push(op); break; }
+                    if (t[2]) _.ops.pop();
+                    _.trys.pop(); continue;
+            }
+            op = body.call(thisArg, _);
+        } catch (e) { op = [6, e]; y = 0; } finally { f = t = 0; }
+        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
+    }
+};
+var _this = this;
+var foo = (function (bar) { return __awaiter(_this, void 0, void 0, function () { return __generator(this, function (_a) {
+    return [2 /*return*/, bar];
+}); }); });
diff --git a/tests/baselines/reference/parenthesizedAsyncArrowFunction.symbols b/tests/baselines/reference/parenthesizedAsyncArrowFunction.symbols
new file mode 100644
index 00000000000..a6428c3e998
--- /dev/null
+++ b/tests/baselines/reference/parenthesizedAsyncArrowFunction.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/parenthesizedAsyncArrowFunction.ts ===
+// Repro from #20096
+
+let foo = (async bar => bar);
+>foo : Symbol(foo, Decl(parenthesizedAsyncArrowFunction.ts, 2, 3))
+>bar : Symbol(bar, Decl(parenthesizedAsyncArrowFunction.ts, 2, 16))
+>bar : Symbol(bar, Decl(parenthesizedAsyncArrowFunction.ts, 2, 16))
+
diff --git a/tests/baselines/reference/parenthesizedAsyncArrowFunction.types b/tests/baselines/reference/parenthesizedAsyncArrowFunction.types
new file mode 100644
index 00000000000..cb1461764cb
--- /dev/null
+++ b/tests/baselines/reference/parenthesizedAsyncArrowFunction.types
@@ -0,0 +1,10 @@
+=== tests/cases/compiler/parenthesizedAsyncArrowFunction.ts ===
+// Repro from #20096
+
+let foo = (async bar => bar);
+>foo : (bar: any) => Promise<any>
+>(async bar => bar) : (bar: any) => Promise<any>
+>async bar => bar : (bar: any) => Promise<any>
+>bar : any
+>bar : any
+
diff --git a/tests/cases/compiler/destructuredDeclarationEmit.ts b/tests/cases/compiler/destructuredDeclarationEmit.ts
new file mode 100644
index 00000000000..99435aff5b1
--- /dev/null
+++ b/tests/cases/compiler/destructuredDeclarationEmit.ts
@@ -0,0 +1,21 @@
+// @declaration: true
+// @filename: foo.ts
+const foo = { bar: 'hello', bat: 'world', bam: { bork: { bar: 'a', baz: 'b' } } };
+const arr: [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]] = [0, 1, 2, ['a', 'b', 'c', [{def: 'def'}, {sec: 'sec'}]]];
+export { foo, arr };
+// @filename: index.ts
+import { foo, arr } from './foo';
+export { foo, arr };
+
+const { bar: baz, bat, bam: { bork: { bar: ibar, baz: ibaz } } } = foo;
+export { baz, ibaz };
+
+const [ , one, , [, bee, , [, {sec} ]]] = arr;
+export { one, bee, sec };
+
+const getFoo = () => ({
+    foo: 'foo'
+});
+
+const { foo: foo2 } = getFoo();
+export { foo2 };
diff --git a/tests/cases/compiler/initializedParameterBeforeNonoptionalNotOptional.ts b/tests/cases/compiler/initializedParameterBeforeNonoptionalNotOptional.ts
new file mode 100644
index 00000000000..327849ae80e
--- /dev/null
+++ b/tests/cases/compiler/initializedParameterBeforeNonoptionalNotOptional.ts
@@ -0,0 +1,12 @@
+// @strict: true
+// @filename: index.d.ts
+export declare function foo({a}?: {
+    a?: string;
+}): void;
+export declare function foo2({a}: {
+    a?: string | undefined;
+} | undefined, b: string): void;
+export declare function foo3({a, b: {c}}: {
+    a?: string | undefined;
+    b?: {c?: string | undefined;} | undefined;
+} | undefined, b: string): void;
\ No newline at end of file
diff --git a/tests/cases/compiler/jsdocIllegalTags.ts b/tests/cases/compiler/jsdocIllegalTags.ts
new file mode 100644
index 00000000000..a59a70dda87
--- /dev/null
+++ b/tests/cases/compiler/jsdocIllegalTags.ts
@@ -0,0 +1,13 @@
+// @allowJs: true
+// @checkJs: true
+// @noEmit: true
+// @Filename: /a.js
+
+class C {
+    /** @template T */
+    constructor() { }
+}
+class D {
+    /** @return {number} */
+    constructor() {}
+}
diff --git a/tests/cases/compiler/mutuallyRecursiveInterfaceDeclaration.ts b/tests/cases/compiler/mutuallyRecursiveInterfaceDeclaration.ts
new file mode 100644
index 00000000000..e9609605c69
--- /dev/null
+++ b/tests/cases/compiler/mutuallyRecursiveInterfaceDeclaration.ts
@@ -0,0 +1,9 @@
+// @declaration: true
+interface A {
+    b: B
+}
+
+interface B {
+    a: A
+}
+export {A, B}
\ No newline at end of file
diff --git a/tests/cases/compiler/parenthesizedAsyncArrowFunction.ts b/tests/cases/compiler/parenthesizedAsyncArrowFunction.ts
new file mode 100644
index 00000000000..00c1aca6533
--- /dev/null
+++ b/tests/cases/compiler/parenthesizedAsyncArrowFunction.ts
@@ -0,0 +1,3 @@
+// Repro from #20096
+
+let foo = (async bar => bar);
diff --git a/tests/cases/fourslash/completionListIsGlobalCompletion.ts b/tests/cases/fourslash/completionListIsGlobalCompletion.ts
index 49196bdabd4..121ab940d65 100644
--- a/tests/cases/fourslash/completionListIsGlobalCompletion.ts
+++ b/tests/cases/fourslash/completionListIsGlobalCompletion.ts
@@ -47,7 +47,7 @@ verify.completionListIsGlobal(true);
 goTo.marker("6");
 verify.completionListIsGlobal(false);
 goTo.marker("7");
-verify.completionListIsGlobal(false);
+verify.completionListIsGlobal(true);
 goTo.marker("8");
 verify.completionListIsGlobal(false);
 goTo.marker("9");
diff --git a/tests/cases/fourslash/completionsImport_default_alreadyExistedWithRename.ts b/tests/cases/fourslash/completionsImport_default_alreadyExistedWithRename.ts
index d8cb53167f5..c8908ab2ebd 100644
--- a/tests/cases/fourslash/completionsImport_default_alreadyExistedWithRename.ts
+++ b/tests/cases/fourslash/completionsImport_default_alreadyExistedWithRename.ts
@@ -16,7 +16,7 @@ verify.completionListContains({ name: "foo", source: "/a" }, "function foo(): vo
 verify.applyCodeActionFromCompletion("", {
     name: "foo",
     source: "/a",
-    description: `Import 'foo' from "./a".`,
+    description: `Import 'foo' from module "./a".`,
     // TODO: GH#18445
     newFileContent: `import f_o_o from "./a";
 import foo from "./a";\r
diff --git a/tests/cases/fourslash/completionsImport_default_anonymous.ts b/tests/cases/fourslash/completionsImport_default_anonymous.ts
index 4be0184d9fa..297567d1c19 100644
--- a/tests/cases/fourslash/completionsImport_default_anonymous.ts
+++ b/tests/cases/fourslash/completionsImport_default_anonymous.ts
@@ -21,7 +21,7 @@ verify.completionListContains({ name: "fooBar", source: "/src/foo-bar" }, "(prop
 verify.applyCodeActionFromCompletion("1", {
     name: "fooBar",
     source: "/src/foo-bar",
-    description: `Import 'fooBar' from "./foo-bar".`,
+    description: `Import 'fooBar' from module "./foo-bar".`,
     // TODO: GH#18445
     newFileContent: `import fooBar from "./foo-bar";\r
 \r
diff --git a/tests/cases/fourslash/completionsImport_default_didNotExistBefore.ts b/tests/cases/fourslash/completionsImport_default_didNotExistBefore.ts
index a4f943f68ee..dcdffc10907 100644
--- a/tests/cases/fourslash/completionsImport_default_didNotExistBefore.ts
+++ b/tests/cases/fourslash/completionsImport_default_didNotExistBefore.ts
@@ -17,7 +17,7 @@ verify.completionListContains({ name: "foo", source: "/a" }, "function foo(): vo
 verify.applyCodeActionFromCompletion("", {
     name: "foo",
     source: "/a",
-    description: `Import 'foo' from "./a".`,
+    description: `Import 'foo' from module "./a".`,
     // TODO: GH#18445
     newFileContent: `import foo from "./a";\r
 \r
diff --git a/tests/cases/fourslash/completionsImport_fromAmbientModule.ts b/tests/cases/fourslash/completionsImport_fromAmbientModule.ts
index 05e7601c690..3b202ee33d6 100644
--- a/tests/cases/fourslash/completionsImport_fromAmbientModule.ts
+++ b/tests/cases/fourslash/completionsImport_fromAmbientModule.ts
@@ -11,7 +11,7 @@
 verify.applyCodeActionFromCompletion("", {
     name: "x",
     source: "m",
-    description: `Import 'x' from "m".`,
+    description: `Import 'x' from module "m".`,
     // TODO: GH#18445
     newFileContent: `import { x } from "m";\r
 \r
diff --git a/tests/cases/fourslash/completionsImport_multipleWithSameName.ts b/tests/cases/fourslash/completionsImport_multipleWithSameName.ts
index 81a054e3d23..50f20d60bf2 100644
--- a/tests/cases/fourslash/completionsImport_multipleWithSameName.ts
+++ b/tests/cases/fourslash/completionsImport_multipleWithSameName.ts
@@ -22,7 +22,7 @@ verify.completionListContains({ name: "foo", source: "/b" }, "const foo: 1", "",
 verify.applyCodeActionFromCompletion("", {
     name: "foo",
     source: "/b",
-    description: `Import 'foo' from "./b".`,
+    description: `Import 'foo' from module "./b".`,
     // TODO: GH#18445
     newFileContent: `import { foo } from "./b";\r
 \r
diff --git a/tests/cases/fourslash/completionsImport_named_namespaceImportExists.ts b/tests/cases/fourslash/completionsImport_named_namespaceImportExists.ts
index 17b909b48ed..4f547259ee8 100644
--- a/tests/cases/fourslash/completionsImport_named_namespaceImportExists.ts
+++ b/tests/cases/fourslash/completionsImport_named_namespaceImportExists.ts
@@ -16,7 +16,7 @@ verify.completionListContains({ name: "foo", source: "/a" }, "function foo(): vo
 verify.applyCodeActionFromCompletion("", {
     name: "foo",
     source: "/a",
-    description: `Import 'foo' from "./a".`,
+    description: `Import 'foo' from module "./a".`,
     // TODO: GH#18445
     newFileContent: `import * as a from "./a";
 import { foo } from "./a";\r
diff --git a/tests/cases/fourslash/completionsImport_ofAlias.ts b/tests/cases/fourslash/completionsImport_ofAlias.ts
index cb4f1255a3e..1eb730df84f 100644
--- a/tests/cases/fourslash/completionsImport_ofAlias.ts
+++ b/tests/cases/fourslash/completionsImport_ofAlias.ts
@@ -28,7 +28,7 @@ verify.not.completionListContains({ name: "foo", source: "/a_reexport_2" }, unde
 verify.applyCodeActionFromCompletion("", {
     name: "foo",
     source: "/a",
-    description: `Import 'foo' from "./a".`,
+    description: `Import 'foo' from module "./a".`,
     // TODO: GH#18445
     newFileContent: `import { foo } from "./a";\r
 \r
diff --git a/tests/cases/fourslash/completionsImport_ofAlias_preferShortPath.ts b/tests/cases/fourslash/completionsImport_ofAlias_preferShortPath.ts
index a1eba5981db..fae8a4abf52 100644
--- a/tests/cases/fourslash/completionsImport_ofAlias_preferShortPath.ts
+++ b/tests/cases/fourslash/completionsImport_ofAlias_preferShortPath.ts
@@ -23,7 +23,7 @@ verify.not.completionListContains({ name: "foo", source: "/foo/index" }, undefin
 verify.applyCodeActionFromCompletion("", {
     name: "foo",
     source: "/foo/lib/foo",
-    description: `Import 'foo' from "./foo".`,
+    description: `Import 'foo' from module "./foo".`,
     // TODO: GH#18445
     newFileContent: `import { foo } from "./foo";\r
 \r
diff --git a/tests/cases/fourslash/completionsImport_require.ts b/tests/cases/fourslash/completionsImport_require.ts
index 8ec750d2c48..2913bac27b0 100644
--- a/tests/cases/fourslash/completionsImport_require.ts
+++ b/tests/cases/fourslash/completionsImport_require.ts
@@ -22,7 +22,7 @@ verify.completionListContains({ name: "foo", source: "/a" }, "const foo: 0", "",
 verify.applyCodeActionFromCompletion("b", {
     name: "foo",
     source: "/a",
-    description: `Import 'foo' from "./a".`,
+    description: `Import 'foo' from module "./a".`,
     // TODO: GH#18445
     newFileContent: `import { foo } from "./a";\r
 \r
@@ -39,7 +39,7 @@ verify.completionListContains({ name: "foo", source: "/a" }, "const foo: 0", "",
 verify.applyCodeActionFromCompletion("c", {
     name: "foo",
     source: "/a",
-    description: `Import 'foo' from "./a".`,
+    description: `Import 'foo' from module "./a".`,
     // TODO: GH#18445
     newFileContent: `import { foo } from "./a";\r
 \r
diff --git a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration_inheritance.ts b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration_inheritance.ts
new file mode 100644
index 00000000000..3002cd4d3e7
--- /dev/null
+++ b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration_inheritance.ts
@@ -0,0 +1,31 @@
+/// <reference path='fourslash.ts'/>
+
+////class C {
+////	constructor(public [|{| "isWriteAccess": true, "isDefinition": true |}x|]: string) {
+////		[|x|];
+////	}
+////}
+////class D extends C {
+////	constructor(public [|{| "isWriteAccess": true, "isDefinition": true |}x|]: string) {
+////		super([|x|]);
+////	}
+////}
+
+const [r0, r1, r2, r3] = test.ranges();
+verify.referenceGroups(r0, [
+    { definition: "(property) C.x: string", ranges: [r0, r2, r3] },
+    { definition: "(parameter) x: string", ranges: [r1] },
+]);
+verify.referenceGroups(r1, [
+    { definition: "(property) C.x: string", ranges: [r0] },
+    { definition: "(parameter) x: string", ranges: [r1] },
+]);
+verify.referenceGroups(r2, [
+    { definition: "(property) C.x: string", ranges: [r0, r1] },
+    { definition: "(property) D.x: string", ranges: [r2] },
+    { definition: "(parameter) x: string", ranges: [r3] },
+]);
+verify.referenceGroups(r3, [
+    { definition: "(property) D.x: string", ranges: [r2] },
+    { definition: "(parameter) x: string", ranges: [r3] },
+]);
diff --git a/tests/cases/fourslash/getOutliningSpans.ts b/tests/cases/fourslash/getOutliningSpans.ts
index 4e2a58c9acb..63e8becfc4f 100644
--- a/tests/cases/fourslash/getOutliningSpans.ts
+++ b/tests/cases/fourslash/getOutliningSpans.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////// interface 
+////// interface
 ////interface IFoo[| {
 ////    getDist(): number;
 ////}|]
@@ -63,9 +63,9 @@
 ////}|])
 ////
 ////// trivia handeling
-////class ClassFooWithTrivia[| /*  some comments */ 
+////class ClassFooWithTrivia[| /*  some comments */
 ////   /* more trivia */ {
-////    
+////
 ////
 ////    /*some trailing trivia */
 ////}|] /* even more */
@@ -85,8 +85,8 @@
 ////        [
 ////          [
 ////            [
-////              1,2,3    
-////            ]    
+////              1,2,3
+////            ]
 ////          ]
 ////        ]
 ////      ]
diff --git a/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl0.ts b/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl0.ts
index a48b381df68..bc852b5c47c 100644
--- a/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl0.ts
+++ b/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl0.ts
@@ -13,6 +13,9 @@
 //// export function f1() { };
 
 verify.importFixAtPosition([
+`import { f1 } from "./a/b";
+
+f1();`,
 `import { f1 } from "b";
 
 f1();`
diff --git a/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl1.ts b/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl1.ts
new file mode 100644
index 00000000000..e690cfd3dbb
--- /dev/null
+++ b/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl1.ts
@@ -0,0 +1,25 @@
+/// <reference path="fourslash.ts" />
+
+// @Filename: /tsconfig.json
+////{
+////    "compilerOptions": {
+////        "baseUrl": "./a"
+////    }
+////}
+
+// @Filename: /a/b/x.ts
+////export function f1() { };
+
+// @Filename: /a/b/y.ts
+////[|f1/*0*/();|]
+
+goTo.file("/a/b/y.ts");
+// Order the local import first because it's simpler.
+verify.importFixAtPosition([
+`import { f1 } from "./x";
+
+f1();`,
+`import { f1 } from "b/x";
+
+f1();`
+]);
diff --git a/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl2.ts b/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl2.ts
new file mode 100644
index 00000000000..658bd25823f
--- /dev/null
+++ b/tests/cases/fourslash/importNameCodeFixNewImportBaseUrl2.ts
@@ -0,0 +1,25 @@
+/// <reference path="fourslash.ts" />
+
+// @Filename: /tsconfig.json
+////{
+////    "compilerOptions": {
+////        "baseUrl": "./a"
+////    }
+////}
+
+// @Filename: /a/b/x.ts
+////export function f1() { };
+
+// @Filename: /a/c/y.ts
+////[|f1/*0*/();|]
+
+goTo.file("/a/c/y.ts");
+// Order the baseUrl import first, because the relative import climbs up to the base url.
+verify.importFixAtPosition([
+`import { f1 } from "b/x";
+
+f1();`,
+`import { f1 } from "../b/x";
+
+f1();`
+]);
diff --git a/tests/cases/fourslash/importNameCodeFixShebang.ts b/tests/cases/fourslash/importNameCodeFixShebang.ts
new file mode 100644
index 00000000000..1ef7be11625
--- /dev/null
+++ b/tests/cases/fourslash/importNameCodeFixShebang.ts
@@ -0,0 +1,18 @@
+/// <reference path="fourslash.ts" />
+
+// @Filename: /a.ts
+////export const foo = 0;
+
+// @Filename: /b.ts
+////[|#!/usr/bin/env node
+////foo/**/|]
+
+goTo.file("/a.ts");
+goTo.file("/b.ts");
+
+verify.importFixAtPosition([
+`#!/usr/bin/env node
+import { foo } from "./a";
+
+foo`,
+]);
diff --git a/tests/cases/fourslash/quickInfoSpecialPropertyAssignment.ts b/tests/cases/fourslash/quickInfoSpecialPropertyAssignment.ts
new file mode 100644
index 00000000000..817e68f6782
--- /dev/null
+++ b/tests/cases/fourslash/quickInfoSpecialPropertyAssignment.ts
@@ -0,0 +1,10 @@
+// @allowJs: true
+// @Filename: /a.js
+////class C {
+////    constructor() {
+////      /** Doc */
+////      this./**/x = 0;
+////    }
+////}
+
+verify.quickInfoAt("", "(property) C.x: number", "Doc ");
diff --git a/tests/cases/fourslash/shims-pp/getOutliningSpans.ts b/tests/cases/fourslash/shims-pp/getOutliningSpans.ts
index 4e2a58c9acb..63e8becfc4f 100644
--- a/tests/cases/fourslash/shims-pp/getOutliningSpans.ts
+++ b/tests/cases/fourslash/shims-pp/getOutliningSpans.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////// interface 
+////// interface
 ////interface IFoo[| {
 ////    getDist(): number;
 ////}|]
@@ -63,9 +63,9 @@
 ////}|])
 ////
 ////// trivia handeling
-////class ClassFooWithTrivia[| /*  some comments */ 
+////class ClassFooWithTrivia[| /*  some comments */
 ////   /* more trivia */ {
-////    
+////
 ////
 ////    /*some trailing trivia */
 ////}|] /* even more */
@@ -85,8 +85,8 @@
 ////        [
 ////          [
 ////            [
-////              1,2,3    
-////            ]    
+////              1,2,3
+////            ]
 ////          ]
 ////        ]
 ////      ]
diff --git a/tests/cases/fourslash/shims/getOutliningSpans.ts b/tests/cases/fourslash/shims/getOutliningSpans.ts
index 4e2a58c9acb..63e8becfc4f 100644
--- a/tests/cases/fourslash/shims/getOutliningSpans.ts
+++ b/tests/cases/fourslash/shims/getOutliningSpans.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////// interface 
+////// interface
 ////interface IFoo[| {
 ////    getDist(): number;
 ////}|]
@@ -63,9 +63,9 @@
 ////}|])
 ////
 ////// trivia handeling
-////class ClassFooWithTrivia[| /*  some comments */ 
+////class ClassFooWithTrivia[| /*  some comments */
 ////   /* more trivia */ {
-////    
+////
 ////
 ////    /*some trailing trivia */
 ////}|] /* even more */
@@ -85,8 +85,8 @@
 ////        [
 ////          [
 ////            [
-////              1,2,3    
-////            ]    
+////              1,2,3
+////            ]
 ////          ]
 ////        ]
 ////      ]