But I don't know anything more about Welsh than what wikipedia offers. Do you know what's going on with their suggested spelling/pronunciation?
(Wiktionary has /kʊtʃ/ for the pronunciation of the English word "cwtch"; the Welsh word is given with the same pronunciation, but the spelling "cwtsh", which is equally weird as far as the material above goes. The etymology does tend to support /tʃ/ in cwtsh - it's a loan of the English word "couch".)
> it's pronounced more like "cutch" (well, for me it is anyway)
I would have to pronounce "cutch" as /kʌtʃ/. /ʊ/ exists (put / foot / look / nook ...), but there isn't a conventional way to spell it so it's unlikely to be used for unfamiliar words. But /kutʃ/ "benefits" from not being unfamiliar to anyone... and one of the very few things I did know about Welsh is that "w" represents /u/.