docs: def load_common(self, wlist):
          """Create the dictionary of common words."""
          self.com_dict = os.path.join(self.base_dir, 'dicts', 'EN_vocab.txt')
          with open(self.com_dict) as words_file:
              data = words_file.read()
          self.common_words = set(data.splitlines())
          if wlist:
              new_words = ''
              for wl in wlist:
                  with open(wl) as f:
                      new_words += f.read()
              if new_words:
                  new_dict = set(data.splitlines())
                  self.common_words.update(new_dict)