code: def activate(locale, path=None):
      
      if path is None:
          path = _DEFAULT_LOCALE_PATH
      if locale not in _TRANSLATIONS:
          translation = gettext_module.translation('humanize', path, [locale])
          _TRANSLATIONS[locale] = translation
      _CURRENT.locale = locale
      return _TRANSLATIONS[locale]
docs: Set 'locale' as current locale. Search for locale in directory 'path'
      @param locale: language name, eg 'en_GB