Rocket.Chat.ReactNative/app/i18n/index.js

import I18n from 'react-native-i18n';
import en from './locales/en';
import ru from './locales/ru';
import pt from './locales/pt-BR';

I18n.fallbacks = true;

I18n.translations = {
	en, ru, pt
};

export default I18n;