code: def _get_translation(self, lang):
          
  
          try:
              return self._translations[lang]
          except KeyError:
              # The fact that `fallback=True` is not the default is a serious design flaw.
              rv = self._translations[lang] = gettext.translation(self._domain, localedir=localedir, languages=[lang],
                                                                  fallback=True)
              return rv
docs: Add a new translation language to the live gettext translator