diff --git a/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm b/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
index 6c79449..ad00946 100644
--- a/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
+++ b/shell/platform/darwin/ios/framework/Source/FlutterEngine.mm
@@ -762,22 +762,6 @@
   NSArray<NSString*>* preferredLocales = [NSLocale preferredLanguages];
   NSMutableArray<NSString*>* data = [[NSMutableArray new] autorelease];
 
-  // Force prepend the [NSLocale currentLocale] to the front of the list
-  // to ensure we are including the full default locale. preferredLocales
-  // is not guaranteed to include anything beyond the languageCode.
-  NSLocale* currentLocale = [NSLocale currentLocale];
-  NSString* languageCode = [currentLocale objectForKey:NSLocaleLanguageCode];
-  NSString* countryCode = [currentLocale objectForKey:NSLocaleCountryCode];
-  NSString* scriptCode = [currentLocale objectForKey:NSLocaleScriptCode];
-  NSString* variantCode = [currentLocale objectForKey:NSLocaleVariantCode];
-  if (languageCode) {
-    [data addObject:languageCode];
-    [data addObject:(countryCode ? countryCode : @"")];
-    [data addObject:(scriptCode ? scriptCode : @"")];
-    [data addObject:(variantCode ? variantCode : @"")];
-  }
-
-  // Add any secondary locales/languages to the list.
   for (NSString* localeID in preferredLocales) {
     NSLocale* currentLocale = [[[NSLocale alloc] initWithLocaleIdentifier:localeID] autorelease];
     NSString* languageCode = [currentLocale objectForKey:NSLocaleLanguageCode];
diff --git a/testing/scenario_app/ios/Scenarios/Scenarios.xcodeproj/project.pbxproj b/testing/scenario_app/ios/Scenarios/Scenarios.xcodeproj/project.pbxproj
index b0c4a57..f24db65 100644
--- a/testing/scenario_app/ios/Scenarios/Scenarios.xcodeproj/project.pbxproj
+++ b/testing/scenario_app/ios/Scenarios/Scenarios.xcodeproj/project.pbxproj
@@ -42,6 +42,7 @@
 		3DEF491823C3BE6500184216 /* golden_platform_view_opacity_iPhone 8_simulator.png in Resources */ = {isa = PBXBuildFile; fileRef = 3DE09E8F23C010BD006C9851 /* golden_platform_view_opacity_iPhone 8_simulator.png */; };
 		3DEF491923C3BE6500184216 /* golden_platform_view_rotate_iPhone 8_simulator.png in Resources */ = {isa = PBXBuildFile; fileRef = 3DE09E8E23C010BD006C9851 /* golden_platform_view_rotate_iPhone 8_simulator.png */; };
 		3DEF491A23C3BE6500184216 /* golden_platform_view_transform_iPhone 8_simulator.png in Resources */ = {isa = PBXBuildFile; fileRef = 3DE09E9123C010BD006C9851 /* golden_platform_view_transform_iPhone 8_simulator.png */; };
+		4F06F1B32473296E000AF246 /* LocalizationInitializationTest.m in Sources */ = {isa = PBXBuildFile; fileRef = 4F06F1B124731F66000AF246 /* LocalizationInitializationTest.m */; };
 		59A97FD8236A49D300B4C066 /* golden_platform_view_multiple_iPhone SE_simulator.png in Resources */ = {isa = PBXBuildFile; fileRef = 59A97FD7236A49D300B4C066 /* golden_platform_view_multiple_iPhone SE_simulator.png */; };
 		59A97FDA236B984300B4C066 /* golden_platform_view_multiple_background_foreground_iPhone SE_simulator.png in Resources */ = {isa = PBXBuildFile; fileRef = 59A97FD9236B984300B4C066 /* golden_platform_view_multiple_background_foreground_iPhone SE_simulator.png */; };
 		6402EBD124147BDA00987DCB /* UnobstructedPlatformViewTests.m in Sources */ = {isa = PBXBuildFile; fileRef = 6402EBD024147BDA00987DCB /* UnobstructedPlatformViewTests.m */; };
@@ -151,6 +152,7 @@
 		3DE09E9023C010BD006C9851 /* golden_platform_view_iPhone 8_simulator.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "golden_platform_view_iPhone 8_simulator.png"; sourceTree = "<group>"; };
 		3DE09E9123C010BD006C9851 /* golden_platform_view_transform_iPhone 8_simulator.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "golden_platform_view_transform_iPhone 8_simulator.png"; sourceTree = "<group>"; };
 		3DE09E9223C010BD006C9851 /* golden_platform_view_cliprect_iPhone 8_simulator.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "golden_platform_view_cliprect_iPhone 8_simulator.png"; sourceTree = "<group>"; };
+		4F06F1B124731F66000AF246 /* LocalizationInitializationTest.m */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.objc; path = LocalizationInitializationTest.m; sourceTree = "<group>"; };
 		59A97FD7236A49D300B4C066 /* golden_platform_view_multiple_iPhone SE_simulator.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "golden_platform_view_multiple_iPhone SE_simulator.png"; sourceTree = "<group>"; };
 		59A97FD9236B984300B4C066 /* golden_platform_view_multiple_background_foreground_iPhone SE_simulator.png */ = {isa = PBXFileReference; lastKnownFileType = image.png; path = "golden_platform_view_multiple_background_foreground_iPhone SE_simulator.png"; sourceTree = "<group>"; };
 		6402EBD024147BDA00987DCB /* UnobstructedPlatformViewTests.m */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.c.objc; path = UnobstructedPlatformViewTests.m; sourceTree = "<group>"; };
@@ -250,6 +252,7 @@
 		248D76ED22E388380012F0C1 /* ScenariosUITests */ = {
 			isa = PBXGroup;
 			children = (
+				4F06F1B124731F66000AF246 /* LocalizationInitializationTest.m */,
 				6402EBD024147BDA00987DCB /* UnobstructedPlatformViewTests.m */,
 				0D14A3FD239743190013D873 /* golden_platform_view_rotate_iPhone SE_simulator.png */,
 				3DE09E8B23C010BC006C9851 /* golden_platform_view_clippath_iPhone 8_simulator.png */,
@@ -503,6 +506,7 @@
 				6816DBA42318358200A51400 /* PlatformViewGoldenTestManager.m in Sources */,
 				248D76EF22E388380012F0C1 /* PlatformViewUITests.m in Sources */,
 				0D8470A4240F0B1F0030B565 /* StatusBarTest.m in Sources */,
+				4F06F1B32473296E000AF246 /* LocalizationInitializationTest.m in Sources */,
 				0A42BFB42447E179007E212E /* TextSemanticsFocusTest.m in Sources */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
diff --git a/testing/scenario_app/ios/Scenarios/Scenarios/AppDelegate.m b/testing/scenario_app/ios/Scenarios/Scenarios/AppDelegate.m
index 9798875..d09cc4d 100644
--- a/testing/scenario_app/ios/Scenarios/Scenarios/AppDelegate.m
+++ b/testing/scenario_app/ios/Scenarios/Scenarios/AppDelegate.m
@@ -26,6 +26,7 @@
 
   NSDictionary<NSString*, NSString*>* launchArgsMap = @{
     // The Platform view golden test args should match `PlatformViewGoldenTestManager`.
+    @"--locale-initialization" : @"locale_initialization",
     @"--platform-view" : @"platform_view",
     @"--platform-view-no-overlay-intersection" : @"platform_view_no_overlay_intersection",
     @"--platform-view-two-intersecting-overlays" : @"platform_view_two_intersecting_overlays",
diff --git a/testing/scenario_app/ios/Scenarios/ScenariosUITests/LocalizationInitializationTest.m b/testing/scenario_app/ios/Scenarios/ScenariosUITests/LocalizationInitializationTest.m
new file mode 100644
index 0000000..974022e
--- /dev/null
+++ b/testing/scenario_app/ios/Scenarios/ScenariosUITests/LocalizationInitializationTest.m
@@ -0,0 +1,36 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#import <Flutter/Flutter.h>
+#import <XCTest/XCTest.h>
+
+FLUTTER_ASSERT_ARC
+
+@interface LocalizationInitializationTest : XCTestCase
+@property(nonatomic, strong) XCUIApplication* application;
+@end
+
+@implementation LocalizationInitializationTest
+
+- (void)setUp {
+  [super setUp];
+  self.continueAfterFailure = NO;
+
+  self.application = [[XCUIApplication alloc] init];
+  self.application.launchArguments = @[ @"--locale-initialization" ];
+  [self.application launch];
+}
+
+- (void)testNoLocalePrepend {
+  NSTimeInterval timeout = 10.0;
+
+  XCUIElement* textInputSemanticsObject =
+      [self.application.textFields matchingIdentifier:@"[en]"].element;
+
+  // The locales recieved by dart:ui are exposed onBeginFrame via semantics label.
+  // There should only be one locale, as we have removed the locale prepend on iOS.
+  XCTAssertTrue([textInputSemanticsObject waitForExistenceWithTimeout:timeout]);
+}
+
+@end
diff --git a/testing/scenario_app/lib/src/locale_initialization.dart b/testing/scenario_app/lib/src/locale_initialization.dart
new file mode 100644
index 0000000..f20985e
--- /dev/null
+++ b/testing/scenario_app/lib/src/locale_initialization.dart
@@ -0,0 +1,69 @@
+// Copyright 2020 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:typed_data';
+import 'dart:ui';
+
+import 'package:vector_math/vector_math_64.dart';
+
+import 'scenario.dart';
+
+/// Sends the recieved locale data back as semantics information.
+class LocaleInitialization extends Scenario {
+  /// Constructor
+  LocaleInitialization(Window window)
+      : assert(window != null),
+        super(window);
+
+  @override
+  void onBeginFrame(Duration duration) {
+    // Doesn't matter what we draw. Just paint white.
+    final SceneBuilder builder = SceneBuilder();
+    final PictureRecorder recorder = PictureRecorder();
+    final Canvas canvas = Canvas(recorder);
+
+    canvas.drawRect(
+      Rect.fromLTWH(0, 0, window.physicalSize.width, window.physicalSize.height),
+      Paint()..color = const Color.fromARGB(255, 255, 255, 255),
+    );
+    final Picture picture = recorder.endRecording();
+
+    builder.addPicture(
+      Offset.zero,
+      picture,
+    );
+    final Scene scene = builder.build();
+    window.render(scene);
+    scene.dispose();
+
+    // On the first frame, pretend that it drew a text field. Send the
+    // corresponding semantics tree comprised of 1 node with the locale data
+    // as the label.
+    window.updateSemantics((SemanticsUpdateBuilder()
+      ..updateNode(
+        id: 0,
+        // SemanticsFlag.isTextField.
+        flags: 16,
+        // SemanticsAction.tap.
+        actions: 1,
+        rect: const Rect.fromLTRB(0.0, 0.0, 414.0, 48.0),
+        label: window.locales.toString(),
+        textDirection: TextDirection.ltr,
+        textSelectionBase: -1,
+        textSelectionExtent: -1,
+        platformViewId: -1,
+        maxValueLength: -1,
+        currentValueLength: 0,
+        scrollChildren: 0,
+        scrollIndex: 0,
+        transform: Matrix4.identity().storage,
+        elevation: 0.0,
+        thickness: 0.0,
+        childrenInTraversalOrder: Int32List(0),
+        childrenInHitTestOrder: Int32List(0),
+        additionalActions: Int32List(0),
+      )).build()
+    );
+  }
+}
diff --git a/testing/scenario_app/lib/src/scenarios.dart b/testing/scenario_app/lib/src/scenarios.dart
index dbfe793..861c71a 100644
--- a/testing/scenario_app/lib/src/scenarios.dart
+++ b/testing/scenario_app/lib/src/scenarios.dart
@@ -6,6 +6,7 @@
 import 'dart:ui';
 
 import 'animated_color_square.dart';
+import 'locale_initialization.dart';
 import 'platform_view.dart';
 import 'poppable_screen.dart';
 import 'scenario.dart';
@@ -14,6 +15,7 @@
 
 Map<String, Scenario> _scenarios = <String, Scenario>{
   'animated_color_square': AnimatedColorSquareScenario(window),
+  'locale_initialization': LocaleInitialization(window),
   'platform_view': PlatformViewScenario(window, 'Hello from Scenarios (Platform View)', id: 0),
   'platform_view_no_overlay_intersection': PlatformViewNoOverlayIntersectionScenario(window, 'Hello from Scenarios (Platform View)', id: 0),
   'platform_view_partial_intersection': PlatformViewPartialIntersectionScenario(window, 'Hello from Scenarios (Platform View)', id: 0),