static S guessGermanOrEnglish_ngrams(S text) {
  int n = 4;
  Set<S> set1 = uniqNgrams(n, mechCISet("English words"));
  Set<S> set2 = uniqNgrams(n, mechCISet("Deutsche Wörter"));
  ret wordScoreBySet(text, set1, set2, "english", "german");
}