Within that conversation about the value of Welsh and how best to support it, you can see this Eisteddfod entry: Fiddler on the Roof, sung by children, in Welsh. Not really a surprise, as people all over the world have found Fiddler's themes of tradition vs. modernity resonate within their own lives.
(I can't figure out how to embed the video here, but please click, you won't be disappointed.)
If you only listen to the beginning, keep an ear open for the Celtic reinterpretation of the fiddler's theme. Fantastic stuff.
And since we're talking about minority languages within English language hegemony... This is the first Yiddish language newscast I've ever seen. It's not really news so much as an in-depth look at the 2014 stabbing of a Chabad bokher in Crown Heights..
And just to tie everything together, please check out this wonderful project documenting the Jews of Wales, sponsored by the Reform community there.