docs: def get_translation_obj(self, lang, field, create=False):
          """
          Return the translation object of an specific field in a Translatable
          istance
  
          @type lang: string
          @param lang: a string with the name of the language
  
          @type field: string
          @param field: a string with the name that we try to get
  
          @rtype: Translation
          @return: Returns a translation object
          """
          trans = None
          try:
              trans = Translation.objects.get(
                  object_id=self.id,
                  content_type=ContentType.objects.get_for_model(self),
                  lang=lang,
                  field=field,
              )
          except Translation.DoesNotExist:
              if create:
                  trans = Translation.objects.create(
                      object_id=self.id,
                      content_type=ContentType.objects.get_for_model(self),
                      lang=lang,
                      field=field,
                  )
          return trans