def add(self, translations, merge=True):
        """Add the given translations to the catalog.

        If the domain of the translations is different than that of the
        current catalog, they are added as a catalog that is only accessible
        by the various ``d*gettext`` functions.

        :param translations: the `Translations` instance with the messages to
                             add
        :param merge: whether translations for message domains that have
                      already been added should be merged with the existing
                      translations
        :return: the `Translations` instance (``self``) so that `merge` calls
                 can be easily chained
        :rtype: `Translations`
        """
        domain = getattr(translations, 'domain', self.DEFAULT_DOMAIN)
        if merge and domain == self.domain:
            return self.merge(translations)

        existing = self._domains.get(domain)
        if merge and existing is not None:
            existing.merge(translations)
        else:
            translations.add_fallback(self)
            self._domains[domain] = translations

        return self
dataset/ETHPy150Open ibagrak/algae/gae/libs/babel/support.py/Translations.add/original