I was reminded yesterday evening of one of the weird transatlantic things – Anthony Bourdain was eating 'turbo' which is, of course, turbot (which any fool knows rhymes with robot). The Americans also insist on the Frenchish pronunciation of Fillet o' Fish. Even in poorest southern backwater that can host a McDonalds, they'll fillet like a mignon. See also clique and niche which I pronounce properly (like an Englishman, and the correct way to pronounce chorizo is, of course, sausage).
Though just to fuck with my expectations, in Texas (or it might have been Colorado) some years back I asked for the buffet [pronounced buff-eh!] and the waiter looked back at me for a second and said don't you mean the buffet, sir? OK, more of a burrf-it. No, I replied brightly, I mean the buffet. Anyway, it was Texas (or Colorado), so we solved our pronunciation dispute through an exchange of medium-to-high calibre gunfire.