A simple script that uses Google Translate API to translate content form JS object into different languages.

createTranslation.js

const fs = require('fs');
const keys = require('../config/keys');

const { Translate } = require('@google-cloud/translate').v2;

const translate = new Translate({
  projectId: keys.googleProjectKey,
  keyFilename: '../google_authentication.json'
});

const appProperties = {
  imageUploadError: 'Error with uploading image',
  imageReadError: 'Could not read image',
  cameraPermissionsError:
    'Sorry, we need camera roll permissions to make this work!'
};

const languages = {
  es: {
    name: 'Spanish',
    nativeName: 'español, castellano'
  },
  it: {
    name: 'Italian',
    nativeName: 'Italiano'
  },
  pt: {
    name: 'Portuguese',
    nativeName: 'Português'
  },
  fr: {
    name: 'French',
    nativeName: 'français'
  },
  de: {
    name: 'German',
    nativeName: 'Deutsch'
  },
  el: {
    name: 'Greek',
    nativeName: 'Ελληνικά'
  },
  nl: {
    name: 'Dutch',
    nativeName: 'Nederlands, Vlaams'
  },
  fi: {
    name: 'Finnish',
    nativeName: 'suomi, suomen kieli'
  },
  sk: {
    name: 'Slovak',
    nativeName: 'slovenčina'
  },
  sl: {
    name: 'Slovene',
    nativeName: 'slovenščina'
  },
  hu: {
    name: 'Hungarian',
    nativeName: 'Magyar'
  },
  uk: {
    name: 'Ukrainian',
    nativeName: 'українська'
  },
  ru: {
    name: 'Russian',
    nativeName: 'русский язык'
  }
};

const translateText = async (text, target) => {
  try {
    const [translations] = await translate.translate(text.trim(), target);
    const translation = Array.isArray(translations)
      ? translations[0]
      : translations;

    return translation;
  } catch (error) {
    console.log(error);
    return '';
  }
};

const translateLanguages = async () => {
  for (let languageCode in languages) {
    const languageElement = languages[languageCode];
    console.log('TRANSLATING:', languageElement.name.toUpperCase());
    const translation = {};

    for (let appProperty in appProperties) {
      const translatedText = await translateText(
        appProperties[appProperty],
        languageCode
      );

      console.log('TRANSLATING KEY', appProperty);
      console.log('FROM', appProperties[appProperty]);
      console.log('TO', translatedText);

      translation[appProperty] = translatedText;
    }

    const fileName = './' + languageElement.name.toUpperCase() + '.json';

    fs.writeFile(fileName, JSON.stringify(translation, null, 2), error => {
      if (error) {
        throw error;
      }

      console.log(fileName + ' is created successfully.');
    });
  }
};