diff --git a/cmake/macos/MacOSXBundleInfo.plist.in b/cmake/macos/MacOSXBundleInfo.plist.in
index 2ead02b7d59..75de15ab50f 100644
--- a/cmake/macos/MacOSXBundleInfo.plist.in
+++ b/cmake/macos/MacOSXBundleInfo.plist.in
@@ -29,7 +29,7 @@
 	<string>${MACOSX_BUNDLE_ICON_FILE}</string>
 
 	<key>CFBundleDevelopmentRegion</key>
-	<string>English</string>
+	<string>en</string>
 
 	<key>NSPrincipalClass</key>
 	<string>NSApplication</string>
diff --git a/mkspecs/macx-clang/Info.plist.app b/mkspecs/macx-clang/Info.plist.app
index 9ee6a6bf0ea..9aca41b6dd9 100644
--- a/mkspecs/macx-clang/Info.plist.app
+++ b/mkspecs/macx-clang/Info.plist.app
@@ -21,6 +21,6 @@
 	<key>NSSupportsAutomaticGraphicsSwitching</key>
 	<true/>
 	<key>CFBundleDevelopmentRegion</key>
-	<string>English</string>
+	<string>en</string>
 </dict>
 </plist>
diff --git a/tests/manual/ios_assets/Info.ios.cmake.plist b/tests/manual/ios_assets/Info.ios.cmake.plist
index ebbb6d93efa..3bb6f562ee5 100644
--- a/tests/manual/ios_assets/Info.ios.cmake.plist
+++ b/tests/manual/ios_assets/Info.ios.cmake.plist
@@ -33,7 +33,7 @@
     <string></string>
 
     <key>CFBundleDevelopmentRegion</key>
-    <string>English</string>
+    <string>en</string>
 
     <key>LSRequiresIPhoneOS</key>
     <true/>