static S conceptLanguageToEnglish_rec(Lisp l) {
  if (l == null) ret "";
  S pattern = conceptToNameOpt(l.head);
  if (empty(pattern)) ret clUnparse(l);
  L<S> args = map(f conceptLanguageToEnglish_rec, l.args);
  S s = formatXYZ_appendRest(pattern, args);
  ret s;
  //ret crazyEnglishFixing(s);
}