Welsh was a dying language, but it seems as though there are more welsh schools popping up, especially in Cardiff where it is now such a metropolitan city with the universities getting bigger with foreign students, and high immigration. When I was in school welsh was an option to take, which i did, but im pretty sure its a compulsory subject which i think it should be. The English language is constantly on the change also.
Its very sad to hear about that tribe. I remember watching a Ray Mears episode, where there was Mauri or Aborginal descendants, and they were trying to get back to the tribes way of life, and teaching their children the way, so that i wouldnt get lost or forgotten and they had problems starting fire by wood friction, and Ray showed them that it was possible to get fire with the local wood.