docs: public static boolean isRuleWord(String word) {
          char c = 0;
          for (int i = 0; i < word.length(); i++) {
              c = word.charAt(i);
  
              if (c != '·') {
                  if (c < 256 || filter.contains(c) || (c = WordAlert.CharCover(word.charAt(i))) > 0) {
                      return true;
                  }
              }
          }
          return false;
      }