Multi-Language support in Flutter

Multi-language support is an important feature to globalize the application and increase the user audience. Language is a factor that connects people and the same principle is applied to app development also. When a customer sees their native language, it creates an emotional bond with the app.

FACT

English continues to represent the most common language on the Internet, almost 75% of app users do not speak English, which leaves a considerable big market available for multilingual apps.

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Flutter by default only provides the US English localization. For supporting other languages, the application must specify additional properties and include the package called flutter_localizations. As of November 2020, this package supports 78 languages.

Check the below code for practical implementation.

Add the below package as a dependency to your pubspec.yaml file:

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:   #Add this line
    sdk: flutter   #Add this line

dependencies:

flutter:

sdk: flutter

flutter_localizations: #Add this line

sdk: flutter #Add this line

In the next step, import the flutter_localizations library and specify localizationsDelegates and supportedLocales for MaterialApp:

import 'package:flutter_localizations/flutter_localizations.dart';

MaterialApp(
 localizationsDelegates: [
   // ... app-specific localization delegate[s] here
   GlobalMaterialLocalizations.delegate,
   GlobalWidgetsLocalizations.delegate,
   GlobalCupertinoLocalizations.delegate,
 ],
 supportedLocales: [
    const Locale('en', ''), // English, no country code
    const Locale('es', ''), // Spanish, no country code
    // ... other locales the app supports
  ],
)

import 'package:flutter_localizations/flutter_localizations.dart';

MaterialApp(

localizationsDelegates: [

// ... app-specific localization delegate[s] here

GlobalMaterialLocalizations.delegate,

GlobalWidgetsLocalizations.delegate,

GlobalCupertinoLocalizations.delegate,

supportedLocales: [

const Locale('en', ''), // English, no country code

const Locale('es', ''), // Spanish, no country code

// ... other locales the app supports

)

Adding the localized messages for multi-language support

Once the flutter_localizations package is added, use the following instructions to add localized text to your application.

Add the intl package to the pubspec.yaml file:

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter
  intl: ^0.16.1   #Add this line

dependencies:

flutter:

sdk: flutter

flutter_localizations:

sdk: flutter

intl: ^0.16.1 #Add this line

Enable the generate flag in the pubspec.yaml file:

flutter:
  generate: true    #Add this line

1 2	flutter: generate: true #Add this line

Add the new yaml file to the root directory of the Flutter project called l10n.yaml with the following content:

arb-dir: lib/l10n
template-arb-file: app_es.arb
output-localization-file: app_localizations.dart

arb-dir: lib/l10n

template-arb-file: app_es.arb

output-localization-file: app_localizations.dart

In ${FLUTTER_PROJECT}/lib/l10n, add the app_es.arb template file.

{
  "hello": "Hola!!"
}

{

"hello": "Hola!!"

}

Now after running the app. A file will be generated in ${FLUTTER_PROJECT}/flutter_gen/gen_l10n after which we will start using the localization in the app.

import 'package:flutter_localizations/flutter_localizations.dart';
import 'package:flutter_gen/gen_l10n/app_localizations.dart'; // Add this line

Widget build(BuildContext context) {
  return Text(AppLocalizations.of(context).hello);
}

import 'package:flutter_localizations/flutter_localizations.dart';

import 'package:flutter_gen/gen_l10n/app_localizations.dart'; // Add this line

Widget build(BuildContext context) {

return Text(AppLocalizations.of(context).hello);

}

In this way, we can support multi-languages in flutter apps.

Refernece

https://flutter.dev/docs/development/accessibility-and-localization/internationalization

rishabh sharma 2 May 2023

. . .

Multi-Language support in Flutter

Adding the localized messages for multi-language support

Refernece

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