diff --git a/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
index 20ef6bead25..e0cd6400e2e 100644
--- a/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/csy/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -150,48 +150,33 @@
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v deklaraci vlastnosti třídy musí přímo odkazovat na předdefinovaný symbol.]]></Val>
-          </Tgt>
+          <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>
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v přetížení metody musí přímo odkazovat na předdefinovaný symbol.]]></Val>
-          </Tgt>
+          <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>
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v literálu typu musí přímo odkazovat na předdefinovaný symbol.]]></Val>
-          </Tgt>
+          <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>
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v ambientním kontextu musí přímo odkazovat na předdefinovaný symbol.]]></Val>
-          </Tgt>
+          <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>
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Název počítané vlastnosti v rozhraní musí přímo odkazovat na předdefinovaný symbol.]]></Val>
-          </Tgt>
+          <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>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -528,6 +513,18 @@
         </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>
+        </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>
+        </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 +771,12 @@
         </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>
+        </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 +2589,12 @@
         </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>
+        </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 +2805,12 @@
         </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>
+        </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>
@@ -2934,12 +2949,9 @@
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Očekával se tento počet argumentů: {0}. Předalo se jich minimálně {1}.]]></Val>
-          </Tgt>
+          <Val><![CDATA[Expected {0} arguments, but got {1} or more.]]></Val>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -2970,12 +2982,9 @@
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Očekával se aspoň tento počet argumentů: {0}. Předalo se jich minimálně {1}.]]></Val>
-          </Tgt>
+          <Val><![CDATA[Expected at least {0} arguments, but got {1} or more.]]></Val>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -4131,6 +4140,15 @@
         </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 +4518,18 @@
         </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>
+        </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>
+        </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 +5454,12 @@
         </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>
+        </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 +5580,12 @@
         </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>
+        </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 +5685,24 @@
         </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>
+        </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>
+        </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>
+        </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 +5730,24 @@
         </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>
+        </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>
+        </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>
+        </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 +6534,12 @@
         </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>
+        </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>
@@ -6678,12 +6762,9 @@
         </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>
-          <Tgt Cat="Text" Stat="Loc" Orig="New">
-            <Val><![CDATA[Odvozený typ {0} odkazuje na nepřístupný typ this. Musí se použít anotace typu.]]></Val>
-          </Tgt>
+          <Val><![CDATA[The inferred type of '{0}' references an inaccessible '{1}' type. A type annotation is necessary.]]></Val>
         </Str>
         <Disp Icon="Str" />
       </Item>
@@ -8733,6 +8814,24 @@
         </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>
+        </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>
+        </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>
+        </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/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl b/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
index e1edb303ec2..009275302b1 100644
--- a/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
+++ b/src/loc/lcl/kor/diagnosticMessages/diagnosticMessages.generated.json.lcl
@@ -2796,6 +2796,12 @@
         </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>
+        </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>
@@ -5439,6 +5445,12 @@
         </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>
+        </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 +5485,7 @@
         <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 +5571,12 @@
         </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>
+        </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>
@@ -8017,7 +8035,7 @@
         <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" />