react-native-language

Integrates I18n.js with React Native. Uses the user preferred locale as default.

Installation

Using yarn (recommended)

$ yarn add react-native-language

Using npm

$ npm install react-native-language --save

Automatic setup

After installing the npm package you need to link the native modules.

If you're using React-Native >= 0.29 just link the library with the command react-native link react-native-language.

If you're using React-Native < 0.29, install rnpm with the command npm install -g rnpm and then link the library with the command rnpm link.

If you're having any issue you can also try to install the library manually as follows.

Automatic setup with Cocoapods

After installing the npm package, add the following line to your Podfile

pod 'RNI18n', :path => '../node_modules/react-native-language'

and run

pod install

Manual setup

iOS

Add RNI18n.xcodeproj to Libraries and add libRNI18n.a to Link Binary With Libraries under Build Phases.
More info and screenshots about how to do this is available in the React Native documentation.

You also need to add the localizations you intend to support to your iOS project. To do that open your Xcode project:

$ open <your-project>.xcodeproj

And add the localizations you will support as shown here:

Android

Add react-native-language to your ./android/settings.gradle file as follows:

include ':app', ':react-native-language'
project(':react-native-language').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-language/android')

Include it as dependency in ./android/app/build.gradle file:

dependencies {
    // ...
    compile project(':react-native-language')
}

Finally, you need to add the package to your MainApplication (./android/app/src/main/java/your/bundle/MainApplication.java):

import com.AlexanderZaytsev.RNI18n.RNI18nPackage; // <-- Add to ReactNativeI18n to the imports

// ...

@Override
protected List<ReactPackage> getPackages() {
    return Arrays.<ReactPackage>asList(
        new MainReactPackage(),
        // ...
        new RNI18nPackage(), // <-- Add it to the packages list
    );
}

// ...

After that, you will need to recompile your project with react-native run-android.

Usage

import I18n from 'react-native-language';
// OR const I18n = require('react-native-language').default

class Demo extends React.Component {
  render() {
    return <Text>{I18n.t('greeting')}</Text>;
  }
}

// Enable fallbacks if you want `en-US` and `en-GB` to fallback to `en`
I18n.fallbacks = true;

I18n.translations = {
  en: {
    greeting: 'Hello!',
  },
  de: {
    greeting: 'Hallo!',
  },
};

This will render Hello! for devices with the English locale, and Hallo! for devices with the German locale.

Usage with multiple location files

// app/i18n/locales/en.js

export default {  
  greeting: 'Hallo!'
};

// app/i18n/locales/de.js

export default {  
  greeting: 'Hallo!'
};

// app/i18n/i18n.js

import I18n from 'react-native-language';
import en from './locales/en';
import de from './locales/de';

I18n.fallbacks = true;

I18n.translations = {
  en,
  de
};

export default I18n;

// usage in component

import I18n from 'app/i18n/i18n';

class Demo extends React.Component {
  render () {
    return (
      <Text>{I18n.t('greeting')}</Text>
    )
  }
}

Fallbacks

When fallbacks are enabled (which is generally recommended), i18n.js will try to look up translations in the following order (for a device with de_DE locale):

• en-US
• en
• de

Note: iOS 8 locales use underscored (de_DE) but i18n.js locales are dasherized (de-DE). This conversion is done automatically for you.

I18n.fallbacks = true;

I18n.translations = {
  en: {
    greeting: 'Hello!',
  },
  'en-GB': {
    greeting: 'Hello, How are you',
  },
};

For a device with a en_GB locale this will return Hello, How are you', for a device with a en_US locale it will return Hello!.

Device's locales

You can get the user preferred locales with the getLanguages method:

import { getLanguages } from 'react-native-language';

getLanguages().then(languages => {
  console.log(languages); // ['en-US', 'en']
});

I18n.js documentation

For more info about I18n.js methods (localize, pluralize, etc) and settings see its documentation.

Licence

MIT