Interesting choice of vocab...is squash very popular in Wales?
It's a racket sport like Tennis, but played with a small rubber ball instead. Quite popular in Wales :)
and against a wall
Oh, that kind of squash. So, is the food squash the same word?
If you mean what in Britain is usually called a courgette, then:
Isn't chwarae supposed to undergo soft mutation after "i"?
No, the letter ch is not one of the mutatable consonants.
Soft mutation (Treiglad Meddal):
B > F,
C > G,
D > DD(*th sound),
G > -(lose the G),
LL > L,
M > F,
P > B,
RH > R,
T > D.