svoid ai_splitSplittables(L<S> tok) {
  MultiSet<S> splits = mechMultiSetCI(ai_language() + " splittables => split");
  for i over tok: {
    L<S> l = splits.get(tok.get(i));
    if (nempty(l))
      replaceSubList(tok, i, i+1, words(first(l)));
  }
}