Trying to sound foreign

I get annoyed when people go to a foreign country and come back acting like they're actually from that place. "We spent a week in BarTHalona. And then a couple of days in THaragoTHa." Sorry pal, you're American and you THound like an aTHole, comprendé? The matador outfit ain't helping either. Same goes for Americans who say "cheers" instead of thank you. You don't sound British, you sound like a big Ted Danson fan. And if you call me "mate," we better be 1) in Australia or 2) hoisting a mainsail.