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Support for multiple abr and messages localization files for intl package.

multiple_localization #

pub package

Support for multiple abr and messages localization files for intl package.

Problem #

If you want to have multiple arb files and register separate delegate for each one of them, then you have a problem. Intl doesn't allow multiple initializeMessages calls. Only first one will be processed and only it's messages will be used. Every calls after the first one will be ignored.

Why do we need to have multiple arb files?

In common scenario - we don't. Just put all localization string in single file and enjoy. But if you want to add intl localization with arb files to separate package, and than use it in you project with it's own localization files - that's problem.

MultipleLocalizations supports using Localizations.override(delegates: [SomeLocalizationsDelegate(), ...]) widget, too.

Exactly for that situation this package was developed.

See article on Medium for more details - Localization for Dart package.

Usage #

To use this package, add multiple_localization as a dependency in your pubspec.yaml file.

Than use MultipleLocalizations.load for your delegate load function, instead of call initializeMessages explicitly.

Example #

class _AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations> {
  const _AppLocalizationsDelegate();

  bool isSupported(Locale locale) {
    return ['en', 'ru'].contains(locale.languageCode);

  Future<AppLocalizations> load(Locale locale) {
    return MultipleLocalizations.load(
        initializeMessages, locale, (l) => AppLocalizations(l),
        setDefaultLocale: true);

  bool shouldReload(LocalizationsDelegate<AppLocalizations> old) {
    return false;

Override string from package in project #

If you want to override string from package localization in project (for example to change some labels in package widgets) - you need to define string with requred name in you app localization class.

Example. #

If package has string messageFromPackageForOverride:

class PackageLocalizations {

  String get messageFromPackageForOverride =>
        Intl.message('Package', name: 'messageFromPackageForOverride');

Then you need to define messageFromPackageForOverride in you AppLocalizations:

class AppLocalizations {

  String get messageFromPackageForOverride =>
        Intl.message('App', name: 'messageFromPackageForOverride');

Make sure that you add the app localization delegate before the package localization delegate:

  const MaterialApp(
    localizationsDelegates: [

Now, whenever package use messageFromPackageForOverride you will see App, not Package.

pub points



Support for multiple abr and messages localization files for intl package.

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flutter, intl


Packages that depend on multiple_localization