The situation of Cornish is rather different from the situation of Yiddish. Cornish entirely disappeared as a native language for about 200 years and the surviv

The situation of Cornish is rather different from the situation of Yiddish. Cornish entirely disappeared as a native language for about 200 years and the surviving literature, mostly from the 15th/16th century, was so meagre that many common words had to be reconstructed by comparison with related languages because they didn't happen to appear in the written record. And yet they now have (a few) native speakers again. Quite a story, really. Of course you can read all about it in Wikipedia: https://kw.wikipedia.org/wiki/Kernowek https://kw.wikipedia.org/wiki/Kernowek