I once read that there was an African lady who was the only remaining speaker of her particular tongue. It did make me wonder how she managed to have a conversation.... Fortunately, a recording was made of her speaking the language before she passed away. Had efforts not been made in the UK, I suppose we would have lost some of our Celtic tongues by now which would also be a tragedy. Even the Yorkshire I spoke as a lad is dying out - I recall the regular usage of 'thee' and 'thou' (or it's common variant 'tha') amongst older people in W Yorks but this form of address is not heard now, tha' knows....