Internationalization with GetX State Management

 import "package:flutter/material.dart";

import "package:get/get.dart";
import "package:getx_state_management/Internationalization/MyController.datr.dart";
import "package:getx_state_management/Internationalization/translations.dart";

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return GetMaterialApp(
      title: "Internationalization",
      debugShowCheckedModeBanner: false,
      translations: Messages(),
      locale: const Locale("en", "US"),

      /// default locale  /// to get device locale Get.deviceLocale
      fallbackLocale: const Locale("en", "US"),

      /// fallbackLocale if wrong locale found
      theme: ThemeData(
        primarySwatch: Colors.grey,
      ),
      home: Internationalization(),
    );
  }
}

class Internationalization extends StatelessWidget {
  MyController2 myController2 = Get.put(MyController2());

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text(
          "Internationalization",
          style: TextStyle(fontWeight: FontWeight.bold),
        ),
        centerTitle: true,
        backgroundColor: Colors.grey,
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            Text(
              "hello, how are you ?".tr,
              style:
                  const TextStyle(fontWeight: FontWeight.bold, fontSize: 30.0),
            ),
            const SizedBox(height: 40.0),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("hi", "IN");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Hindi",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("fr", "FR");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "French",
                    style: TextStyle(
                        fontWeight: FontWeight.bold, color: Colors.white),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("pn", "PN");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Punjabi",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("ur", "UR");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Urdu",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("en", "US");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "English",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("ar", "AR");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Arabic",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
              ],
            ),
            const SizedBox(height: 30.0),
            Row(
              mainAxisAlignment: MainAxisAlignment.center,
              children: [
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("tm", "TM");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Tamil",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("gj", "GJ");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Gujarati",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("mr", "MR");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Marathi",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("si", "SI");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Sindhi",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("tg", "TG");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Telugu",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
                ElevatedButton(
                  onPressed: () {
                    myController2.changeLanguage("ml", "ML");
                  },
                  style: ElevatedButton.styleFrom(
                    backgroundColor: Colors.blue,
                  ),
                  child: const Text(
                    "Malayalam",
                    style: TextStyle(
                        color: Colors.white, fontWeight: FontWeight.bold),
                  ),
                ),
              ],
            ),
          ],
        ),
      ),
    );
  }
}

import "package:get/get.dart";

class Messages extends Translations {
  @override
  Map<String, Map<String, String>> get keys => {
        "en_US": {
          "hello, how are you ?": "Hello, How are you ?",
        },
        "hi_IN": {
          "hello, how are you ?": "नमस्ते, आप कैसे हैं ?",
        },
        "fr_FR": {
          "hello, how are you ?": "bonjour comment allez-vous ?",
        },
        "ar_AR": {
          "hello, how are you ?": "مرحبا، كيف حالك ؟",
        },
        "pn_PN": {
          "hello, how are you ?": "ਹੈਲੋ ਤੁਸੀ ਕਿਵੇਂ ਹੋ ?",
        },
        "ur_UR": {
          "hello, how are you ?": "ہیلو آپ کیسے ہیں ؟",
        },
        "tm_TM": {
          "hello, how are you ?": "வணக்கம் எப்படி இருக்கிறாய் ?",
        },
        "gj_GJ": {
          "hello, how are you ?": "હેલો, તમે કેમ છો?",
        },
        "mr_MR": {
          "hello, how are you ?": "नमस्कार, कसे आहात?",
        },
        "si_SI": {
          "hello, how are you ?": "سلام توهان ڪيئن آهيو ؟",
        },
        "tg_TG": {
          "hello, how are you ?": "హలో, ఎలా ఉన్నారు?",
        },
        "ml_ML": {
          "hello, how are you ?": "ഹലോ, നിങ്ങൾക്ക് സുഖമാണോ ?",
        },
      };
}

import "package:flutter/material.dart";
import "package:get/get.dart";

class MyController2 extends GetxController {
  /// Here below, the Language code will store in "parameter1" and
  /// the Country code will store in "parameter2"
  void changeLanguage(var parameter1, var parameter2) {
    var locale = Locale(parameter1, parameter2);
    Get.updateLocale(locale);
  }
}