'Return the translation of me to the given locale.
If there is no such Document, return None.'

def translated_to(self, locale):

    if (self.locale != settings.WIKI_DEFAULT_LANGUAGE):
        raise NotImplementedError('translated_to()    is    implemented    only    onDocuments    in    the    default    language    sofar.')
    try:
        return Document.objects.get(locale=locale, parent=self)
    except Document.DoesNotExist:
        return None
