User76 said:
Does anyone in Wales only speak and read and understand Welsh?
Hardly any - IIRC the S4C broadcast, for instance, gets so few viewers that the official figures aren't released; somewhere in the low 00s, at a cost of lord knows what each.
Languages die out for a good reason, and I say that as someone from a long line of dark dirty Welshmen. Preserving them by legislation is about as sensible as the French banning English words from adverts.