How do you perform localization and internationalization in Flutter?

I-Hub Talent is recognized as the best Flutter training course institute in Hyderabad, offering comprehensive training that empowers students to build high-quality mobile applications using the popular Flutter framework. With a strong focus on hands-on learning, I-Hub Talent stands out by providing live internship programs that ensure students gain real-world experience while mastering Flutter.

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Localization and internationalization in Flutter are handled using the built-in flutter_localizations package and tools like ARB files and the intl package to support multiple languages and regions.

1. Internationalization (i18n)

Internationalization involves preparing your app to support different languages and formats. Flutter uses:

  • MaterialApp or CupertinoApp: Set localizationsDelegates and supportedLocales.

  • Use the intl package to handle dates, numbers, and messages formatting.

2. Localization (l10n)

Localization is about adding actual translations. Here's how:

a. Enable localization support

In pubspec.yaml:

b. Create ARB files

Use App Resource Bundle (ARB) files in the lib/l10n/ folder. For example:

  • app_en.arb (English)

  • app_es.arb (Spanish)

Each file contains key-value pairs:

c. Generate localization code

Flutter automatically generates localization code if you're using Flutter’s l10n tool. Add this to pubspec.yaml:

d. Use localized strings

In widgets:

This setup allows your app to dynamically adapt to the device's locale and support multiple languages efficiently. For complex apps, tools like Flutter Intl plugin can streamline the process.

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