code: def collect_translations(self):
          
          languages = {}
          locale_data = {}
  
          for language_code, label in settings.LANGUAGES:
              languages[language_code] = '%s' % label
  
              # Create django translation engine for `language_code`
              trans_cat, trans_fallback_cat = self.get_catalog(language_code)
  
              # Add the meta object
              locale_data[language_code] = {}
              locale_data[language_code][""] = self.make_header(language_code, trans_cat)
              num_plurals = self._num_plurals(trans_cat)
  
              # Next code is largely taken from Django@master (01.10.2017) from `django.views.i18n JavaScriptCatalogue`
              pdict = {}
              seen_keys = set()
  
              for key, value in itertools.chain(six.iteritems(trans_cat), six.iteritems(trans_fallback_cat)):
                  if key == '' or key in seen_keys:
                      continue
  
                  if isinstance(key, six.string_types):
                      locale_data[language_code][key] = [value]
  
                  elif isinstance(key, tuple):
                      msgid, cnt = key
                      pdict.setdefault(msgid, {})[cnt] = value
  
                  else:
                      raise TypeError(key)
                  seen_keys.add(key)
  
              for k, v in pdict.items():
                  locale_data[language_code][k] = [v.get(i, '') for i in range(num_plurals)]
  
          for key, value in locale_data.items():
              locale_data[key] = json.dumps(value)
  
          return languages, locale_data
docs: Collect all `domain` translations and return `Tuple[languages, locale_data]`