strapi/packages/strapi-helper-plugin/lib/src/i18n.js

/**
 * i18n.js
 *
 * This will setup the i18n language files and locale data for your plugin.
 *
 */

/* eslint-disable no-console */
import { reduce } from 'lodash';

// Plugin identifier based on the package.json `name` value
const pluginPkg = require('../../../../package.json');

const pluginId = pluginPkg.name.replace(/^strapi-plugin-/i, '');

/**
 * Add plugin identifier as translation message prefix,
 * in order to avoid confusion and errors when many
 * plugins are installed.
 *
 * @param messages
 */
const formatMessages = messages =>
  reduce(
    messages,
    (result, value, key) => {
      result[`${pluginId}.${key}`] = value;

      return result;
    },
    {}
  );

/**
 * Try to require translation file.
 *
 * @param language {String}
 */
const requireTranslations = language => {
  try {
    return require(`translations/${language}.json`); // eslint-disable-line global-require
  } catch (error) {
    console.error(
      `Unable to load "${language}" translation for the plugin ${pluginId}. Please make sure "${language}.json" file exists in "pluginPath/admin/src/translations" folder.`
    );
  }
};

/**
 * Dynamically generate `translationsMessages object`.
 */

const translationMessages = reduce(
  strapi.languages,
  (result, language) => {
    result[language] = formatMessages(requireTranslations(language));

    return result;
  },
  {}
);

export { translationMessages };