I’ve heard the Welsh LL pronounced with a bit of an HL sound at the end, like a guttural “sh-h-l” sound. I’m trying (although episodically, and not very hard) to learn Welsh, and the LL sound clearly is the hardest to replicate. (The CH actually is pretty easy, like the CH at the end of the Scottish “loch,” or the CH at the beginning of a very Hebrew-accented Yiddish “chutzpah.”)