code: def update_journals(self):
          
          for field in record_get_field_instances(self.record, '773'):
              subs = field_get_subfield_instances(field)
              new_subs = []
              volume_letter = ""
              journal_name = ""
              for idx, (key, value) in enumerate(subs):
                  if key == 'p':
                      journal_name = self.get_config_item(value, "journals", allow_substring=False)
                      # Make sure journal names have the form (dot)(space) (I know it's horrible)
                      journal_name = journal_name.replace('. ', '.').replace('.', '. ').replace('. ,', '.,').strip()
                  elif key == 'v':
                      volume_letter = value
                  else:
                      new_subs.append((key, value))
  
              if not journal_name == "PoS":
                  # Special handling of journal name and volumes, except PoS
                  letter = return_letters_from_string(volume_letter)
                  if letter:
                      journal_name = "{0} {1}".format(journal_name, letter)
                      volume_letter = volume_letter.strip(letter)
  
              if journal_name:
                  new_subs.append(("p", journal_name))
              if volume_letter:
                  new_subs.append(("v", volume_letter))
              record_delete_field(self.record, tag="773",
                                  field_position_global=field[4])
              record_add_field(self.record, "773", subfields=new_subs)
docs: 773 journal translations.