Halò a chàirdean, I know this was long ago but feel like answering for whoever has the same problem. It seems there is no word for "not" in Gàidhlig. It is chan eil or cha robh or cha bhi or a lot of other things, but never not. They just don't have it. It seems a bit crazy because every other language around is using "yes" and "no" words, but this is part of the fun. 's e Gàidhlig a th' ann.