As an english person living in Wales I am for learning welsh.
Welsh is widely spoken in the north of the country and making a come back further south. The Welsh are really trying to bring it back into their culture and good on them imo. It may not be widely spoken elsewhere in the world but here in Wales it is recognised and most jobs in Wales offer a small premium if you are able to speak the language. Every job I have applied for in the past 3 years in Wales has had a small section on the application form asking if I can speak welsh, read welsh, understand welsh and to what level. Its only a small part of the form and similar to the sections that ask what ethnic group you belong.
Some of the young girls on my college course went to Welsh school (fluent welsh) and when looking for part time jobs even - got then jobs because they could speak welsh, those that didnt speak welsh have not had quite as much success. Ok this is only weekend cafe/museum work etc but there is the proof. In Wales - even as far south as I am, it is a respected and sought after language.
Any language qualification whether its a widely spoken one like Spanish or less widely spoken such as Welsh prooves a persons ability to understand languages and is an indicator that they could learn other languages easily as well.
My daughter who was born in Scotland to English parents but currently residing in Wales is doing a Welsh GCSE (from scratch - she has never learnt Welsh yet as been in a English school up until now) and I am very pleased and dont see it as a waste at all. She is into liguistics anyway and she is excited about learning it and it will aid her in understanding other languages and linguistics. I am also looking forward to her helping me with my appalling pronounciation of local place names - that usually make my local friends laugh at me
.
England is so wishy washy and crap imo at its culture and patriotism is seriously lacking imo especially in comparison to the Welsh and the Scots who seem to be so much more passionate about their culturer, traditions and patriotism.