my_lang is a library that provides flexible and easy-to-use localization support for Flutter applications.

Features

• Multi-language support using JSON files.
• Easy to integrate and use.
• Dynamic language switching in the app.
• Automatically reads JSON files and generates Dart files without manually entering each key.

Installation

Add the following to your pubspec.yaml:

my_lang: ^latest_version

flutter:
  assets:
    - assets/i18n/

JSON Language File Structure

Create JSON files inside the assets/i18n/ directory:

en.json

{
  "welcomeBack": "Welcome Back",
  "welcomeBackNameApp": "Welcome @nameUser Back @nameApp"
}

vi.json

{
  "welcomeBack": "Chào mừng trở lại",
  "welcomeBackNameApp": "Chào mừng @nameUser trở lại @nameApp"
}

Initializing the Library

import 'package:my_lang/my_lang.dart';
import 'package:flutter/widgets.dart';

MyLang myLang = MyLang();

const listLocale = [
  Locale('en'),
  Locale('vi'),
];

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await myLang.setUp(listLocale: listLocale);
  runApp(MyApp());
}

Creating the interpreter.dart File

Create the interpreter.dart file containing the OurLang class:

import 'package:my_lang/my_lang.dart';

class OurLang extends MyLang {
  static String get welcomeBack => MyLang.translate('welcomeBack');
  static String? welcomeBackNameApp(String nameUser, String nameApp) =>
      MyLang.translate('welcomeBackNameApp', params: {
        'nameUser': nameUser,
        'nameApp': nameApp,
      });
}

Usage

print(OurLang.welcomeBack); // "Welcome Back" or "Chào mừng trở lại"
print(OurLang.welcomeBackNameApp("John", "MyApp"));

Changing Language in the App

myLang.loadFileJson(locale: myLang.locale.languageCode == 'en'
? const Locale("vi")
    : const Locale("en"));

Generating OurLang Automatically

Run the following command to automatically generate interpreter.dart:

dart pub global activate my_lang

my_lang 

my_lang -i assets/i18n/en.json -o lib/interpreter.dart -c YourLang 

💡 Tip: Quickly copy a file path using these shortcuts on Android Studio:

• MacBook: Command (⌘) + Option (⌥) + C
• Windows: Ctrl + Shift + C

Contribution

If you have any suggestions or find any issues, feel free to open an issue or submit a pull request on GitHub. If you want to know what i do in package, checking my document here https://wong-coupon.gitbook.io/flutter/ui/multi-language

Developer Team:

Any comments please contact us ThaoDoan and DucNguyen.