code: def localization_merge_back(updated_localizable_file, old_translated_file, new_translated_file, merged_translated_file):
      
      output_file_elements = []
      old_translated_file_dict = generate_localization_key_to_entry_dictionary_from_file(old_translated_file)
      new_translated_file_dict = generate_localization_key_to_entry_dictionary_from_file(new_translated_file)
  
      f = open_strings_file(updated_localizable_file, "r")
  
      for header_comment, comments, key, value in extract_header_comment_key_value_tuples_from_file(f):
          translation_value = None
          if len(header_comment) > 0:
              output_file_elements.append(Comment(header_comment))
  
          if value in new_translated_file_dict:
              translation_value = new_translated_file_dict[value].value
          elif key in old_translated_file_dict:
              translation_value = old_translated_file_dict[key].value
          elif key in new_translated_file_dict:
              translation_value = new_translated_file_dict[key].value
  
          if translation_value is not None:
              output_file_elements.append(LocalizationEntry(comments, key, translation_value))
  
      f.close()
  
      write_file_elements_to_strings_file(merged_translated_file, output_file_elements)
docs: Generates a file merging the old translations and the new ones.
  
      Args:
          updated_localizable_file (str): The path to the updated localization strings file, meaning the strings that
              require translation.
          old_translated_file (str): The path to the strings file containing the previously translated strings.
          new_translated_file (str): The path to the strings file containing the newly translated strings.
          merged_translated_file (str): The path to the output file with the merged translations.