Take your pick.
Indeed there are no shortage of issues, although in the 60's and 70's the main issue was the (lack of) status of the language in Wales
Interesting. Mind elaborating?
Here are some links:- https://www.llgc.org.uk/ymgyrchu/Iaith/TyngedIaith/index-e.htm
https://en.wikipedia.org/wiki/Welsh_Language_Society