I think that’s a brilliant idea. The Senedd would need to make the designation/provision of this part of the local Council’s duties. They could then approach Community/Parish Councils, Marched y Wawr, Women’s Institutes etc… But it could not be compelled if the Village was totally monoglot English! Compulsion only leads to resentment. Our village had one family who were Welsh speaking and there was a family in Horton, now dead, I believe. Gower had been English since ‘acquired’ by the Norman King of England and ‘given’ to one of his followers. To most South and East Gower people, Welsh was as alien as Russian!