Flutter Translator

Flutter Translator is a package use for in-app localization with Map data. More easier and faster to implement. This package is inspired by the flutter_localizations itself. Follow the step below to use the package or checkout a small complete example project of the package.

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How To Use

Prepare language source (Map<String, dynamic>)

Create a dart file which will contain all the Map data of the locale language your app need. You can change the file name, class name, and file path whatever you like. Example:

mixin AppLocale {
  static const String title = 'title';

  static const Map<String, dynamic> EN = {title: 'Localization'};
  static const Map<String, dynamic> KM = {title: 'ការធ្វើមូលដ្ឋានីយកម្ម'};
  static const Map<String, dynamic> JA = {title: 'ローカリゼーション'};

Project configuration

  • Initialize the TranslatorGenerator object (this can be local or global, up to you)
final TranslatorGenerator translator = TranslatorGenerator.instance;
  • Init the list of MapLocale and startup language for the app. This has to be done only at the main.dart or the first MaterialApp in your project.
void initState() {
        mapLocales: [
            MapLocale('en', AppLocale.EN),
            MapLocale('km', AppLocale.KM),
            MapLocale('ja', AppLocale.JA),
        initLanguageCode: 'en',
    translator.onTranslatedLanguage = _onTranslatedLanguage;

/// the setState function here is a must to add
void _onTranslatedLanguage(Locale? locale) {
    setState(() {});
  • Add supportedLocales and localizationsDelegates to the MaterialApp
Widget build(BuildContext context) {
    return MaterialApp(
        supportedLocales: translator.supportedLocales,
        localizationsDelegates: translator.localizationsDelegates,
        home: SettingsScreen(),
  • Call the translate function anytime you want to translate the app and provide it with the language code
    child: const Text('English'),
    onPressed: () {
  • To display the value from the Map data, just call the getString function by providing the key of the data or use the getString extension (the AppLocale.title is the constant from mixin class above)


  • You also can get the language name too. If you don't specify the language code for the function, it will return the language name depend on the current app locale
translator.getLanguageName(languageCode: 'en');  // English
translator.getLanguageName(languageCode: 'km');  // ភាសាខ្មែរ
translator.getLanguageName(languageCode: 'ja');  // 日本語

translator.getLanguageName();  // get language name depend on current app locale