Yet another internationalization for Node.js

i18n.translate.js

var translate = function (locale, singular, plural) {
  if (locale === undefined) {
    if (debug) logger.warn('i18n: no locale found');
    locale = defaultLocale;
  }
  if (!locales[locale]) {
    read(locale);
  }
  var capitalHead = new RegExp('^[A-Z]');
  var upperHead = singular.match(capitalHead);
  singular = upperHead ? singular[0].toLowerCase() + singular.substring(1) : singular;
  if (plural) {
    plural = upperHead ? plural[0].toLowerCase() + plural.substring(1) : plural;
    if (!locales[locale][singular]) {
      logger.info('i18n: add %s (%s)', singular, locale);
      locales[locale][singular] = {
        'one': singular,
        'other': plural
      };
      write(locale);
    }
  }
  if (!locales[locale][singular]) {
    logger.info('i18n: add %s (%s)', singular, locale);
    locales[locale][singular] = singular;
    write(locale);
  }
  var sentence = locales[locale][singular];
  return upperHead ? sentence[0].toUpperCase() + sentence.substring(1) : sentence;
};