add zh-TW supported

feedback/lib/src/l18n/translation.dart

@@ -228,6 +228,24 @@ class ZhFeedbackLocalizations extends FeedbackLocalizations {
   String get navigate => '导航';
 }
 
+/// Default Simplified Chinese localization
+class ZhTWFeedbackLocalizations extends FeedbackLocalizations {
+  /// Creates a [ZhTWFeedbackLocalizations].
+  const ZhTWFeedbackLocalizations();
+
+  @override
+  String get submitButtonText => '提交';
+
+  @override
+  String get feedbackDescriptionText => '敬請留下您寶貴的意見和建議：';
+
+  @override
+  String get draw => '標記';
+
+  @override
+  String get navigate => '切換頁面';
+}
+
 /// Default polish localization
 class PlFeedbackLocalizations extends FeedbackLocalizations {
   /// Creates a [PlFeedbackLocalizations].
@@ -261,7 +279,7 @@ class PtFeedbackLocalizations extends FeedbackLocalizations {
   String get draw => 'Desenhar';
 
   @override
-  String get navigate => 'Navegar';
+  String get navigate => '瀏覽頁面';
 }
 
 /// Default japanese localization
@@ -361,6 +379,7 @@ class GlobalFeedbackLocalizationsDelegate
     const Locale('uk'): const UkFeedbackLocalizations(),
     const Locale('tr'): const TrFeedbackLocalizations(),
     const Locale('zh'): const ZhFeedbackLocalizations(),
+    const Locale('zh', 'TW'): const ZhTWFeedbackLocalizations(),
     const Locale('pl'): const PlFeedbackLocalizations(),
     const Locale('pt'): const PtFeedbackLocalizations(),
     const Locale('ja'): const JaFeedbackLocalizations(),
@@ -389,8 +408,12 @@ class GlobalFeedbackLocalizationsDelegate
 
   @override
   Future<FeedbackLocalizations> load(Locale locale) {
-    final languageLocale = Locale(locale.languageCode);
-    // We only support language codes for now
+    Locale languageLocale;
+    if (supportedLocales.containsKey(locale)) {
+      languageLocale = locale;
+    } else {
+      languageLocale = Locale(locale.languageCode);
+    }
     return SynchronousFuture<FeedbackLocalizations>(
       supportedLocales[languageLocale] ?? supportedLocales[defaultLocale]!,
     );

feedback/test/l18n/feedback_l18n_test.dart

@@ -0,0 +1,21 @@
+import 'package:feedback/feedback.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  test('overwrites locale', () async {
+    const language = Locale('zh', 'TW');
+    final GlobalFeedbackLocalizationsDelegate delegate =
+        GlobalFeedbackLocalizationsDelegate();
+    final FeedbackLocalizations localizations = await delegate.load(language);
+    const ZhTWFeedbackLocalizations targetLocalizations =
+        ZhTWFeedbackLocalizations();
+    // ensure overrides apply
+    expect(localizations.draw, targetLocalizations.draw);
+    expect(localizations.navigate, targetLocalizations.navigate);
+    expect(
+        localizations.submitButtonText, targetLocalizations.submitButtonText);
+    expect(localizations.feedbackDescriptionText,
+        targetLocalizations.feedbackDescriptionText);
+  });
+}