docs: def create(spellchecker_cache_path):
      """Create a Dictionary at spellchecker_cache_path with valid words."""
      user_dictionary = os.path.join(os.getcwd(), "DICTIONARY")
      user_words = read_dictionary_file(user_dictionary)
  
      valid_words = Dictionary(valid_words_set(user_dictionary, user_words),
                               "valid_words",
                               [user_dictionary],
                               spellchecker_cache_path)
  
      return (user_words, valid_words)