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Description:

gettext i18n

Flutter i18n with gettext #
This package helps internationalizing a Flutter application.
It is based on gettext and gettext_parser.
Features #

Supports from placeholders in the message keys

Usage #
Add this package, and flutter_localizations, to pubspec.yaml:
flutter pub add gettext_i18n
flutter pub add flutter_localizations --sdk=flutter
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In pubspec.yaml, add assets/i18n/ as an asset folder:
flutter:
assets:
- assets/i18n/
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Optionnal: in that folder, place your translation files:
$ ls assets/i18n/
en.po
fr_CH.po
fr.po
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In your application file, declare supported locales, and initialize translations:
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);

@override
Widget build(BuildContext context) {
return MaterialApp(
...
home: const HomePage(),
supportedLocales: const [
Locale('en'),
Locale('fr'),
Locale('fr', 'CH'),
],
localizationsDelegates: [
GettextLocalizationsDelegate(defaultLanguage: 'en'),
GlobalMaterialLocalizations.delegate,
GlobalWidgetsLocalizations.delegate,
],
);
}
}
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In files where you want to translate a string :
import 'package:gettext_i18n/gettext_i18n.dart';

var translatedString = context.t('{2} ! Pi is greater than {0} and smaller than {1}', args: [3, 4, 'Hello']);
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Additional information #
.po files can be edited by hand, but it's preferable to use an editor or an online service to manage them.