diff --git a/Docs/ProjectSpec.md b/Docs/ProjectSpec.md
index c644546c..66bbe2ad 100644
--- a/Docs/ProjectSpec.md
+++ b/Docs/ProjectSpec.md
@@ -69,7 +69,9 @@ Note that target names can also be changed by adding a `name` property to a targ
 	- `all`: project and target settings
 	- `project`: only project settings
 	- `targets`: only target settings
-	- `none`: no settings are automatically applied	
+	- `none`: no settings are automatically applied
+- ⚪️ **developmentLanguage**: `String` - Sets the development language of the project. Defaults to `en`
+
 ### Configs
 Each config maps to a build type of either `debug` or `release` which will then apply default build settings to the project. Any value other than `debug` or `release` (for example `none`), will mean no default build settings will be applied to the project.
 
diff --git a/Sources/ProjectSpec/ProjectSpec.swift b/Sources/ProjectSpec/ProjectSpec.swift
index afa9e419..f8422ce4 100644
--- a/Sources/ProjectSpec/ProjectSpec.swift
+++ b/Sources/ProjectSpec/ProjectSpec.swift
@@ -32,6 +32,7 @@ public struct ProjectSpec {
         public var createIntermediateGroups: Bool
         public var bundleIdPrefix: String?
         public var settingPresets: SettingPresets
+        public var developmentLanguage: String?
 
         public enum SettingPresets: String {
             case all
@@ -54,11 +55,12 @@ public struct ProjectSpec {
             }
         }
 
-        public init(carthageBuildPath: String? = nil, createIntermediateGroups: Bool = false, bundleIdPrefix: String? = nil, settingPresets: SettingPresets = .all) {
+        public init(carthageBuildPath: String? = nil, createIntermediateGroups: Bool = false, bundleIdPrefix: String? = nil, settingPresets: SettingPresets = .all, developmentLanguage: String? = nil) {
             self.carthageBuildPath = carthageBuildPath
             self.createIntermediateGroups = createIntermediateGroups
             self.bundleIdPrefix = bundleIdPrefix
             self.settingPresets = settingPresets
+            self.developmentLanguage = developmentLanguage
         }
     }
 
diff --git a/Sources/XcodeGenKit/PBXProjGenerator.swift b/Sources/XcodeGenKit/PBXProjGenerator.swift
index d30fcf6b..4b7e3909 100644
--- a/Sources/XcodeGenKit/PBXProjGenerator.swift
+++ b/Sources/XcodeGenKit/PBXProjGenerator.swift
@@ -129,7 +129,7 @@ public class PBXProjGenerator {
                               buildConfigurationList: buildConfigList.reference,
                               compatibilityVersion: "Xcode 3.2",
                               mainGroup: mainGroup.reference,
-                              developmentRegion: "English",
+                              developmentRegion: spec.options.developmentLanguage ?? "en",
                               knownRegions: knownRegions,
                               targets: targets.references,
                               attributes: projectAttributes)
diff --git a/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj b/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
index da5b2bb6..aa8d6f7f 100644
--- a/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
+++ b/Tests/Fixtures/TestProject/Project.xcodeproj/project.pbxproj
@@ -471,7 +471,7 @@
 			};
 			buildConfigurationList = CL_844877120535 /* Build configuration list for PBXProject "Project" */;
 			compatibilityVersion = "Xcode 3.2";
-			developmentRegion = English;
+			developmentRegion = en;
 			knownRegions = (
 				en,
 				Base,
diff --git a/Tests/XcodeGenKitTests/ProjectGeneratorTests.swift b/Tests/XcodeGenKitTests/ProjectGeneratorTests.swift
index f869fbb0..1d2dd94b 100644
--- a/Tests/XcodeGenKitTests/ProjectGeneratorTests.swift
+++ b/Tests/XcodeGenKitTests/ProjectGeneratorTests.swift
@@ -52,6 +52,16 @@ func projectGeneratorTests() {
                 let allSettings = project.pbxproj.buildConfigurations.reduce([:]) { $0.merged($1.buildSettings) }.keys.sorted()
                 try expect(allSettings) == ["SETTING_2"]
             }
+
+            $0.it("generates development language") {
+                let options = ProjectSpec.Options(developmentLanguage: "de")
+                let spec = ProjectSpec(basePath: "", name: "test", options: options)
+                let project = try getProject(spec)
+                guard let pbxProject = project.pbxproj.projects.first else {
+                    throw failure("Could't find PBXProject")
+                }
+                try expect(pbxProject.developmentRegion) == "de"
+            }
         }
 
         $0.describe("Config") {