addLocalization (lang, strings) {
    mergeLocale(lang, strings)
    // eslint-disable-next-line no-console
    console.log(`[ClientAddonApi] Registered new strings for locale ${lang}`)
  }
Merge new strings into the specified lang translations (using vue-i18n).

@param {string} lang Locale to merge to (ex: 'en', 'fr'...)
@param {object} strings A vue-i18n strings object containing the translations