Going to sneak in my favourite uniquely (I believe) Kiwi mispronunciation.
Cache (as applied to computer memory) – is a word meaning ‘temporary storage’. It’s borrowed from the concealed/protected stash of food used by explorers and hunters – cached on the way out, recovered on the homeward journey.
Growing up in Canada, we used it as kids. It had been in active use there for 400+ years (French & English). There’s even a town in BC called Cache Creek. But it’s always been pronounced ‘cash’. In NZ, many (most ?) pronounce it ‘caish’.
I’ve never figured out how that got started.