At least they speak the same language

One for my wife (American) who has adopted 'bloody hell' as her own.

I was once in America for a product launch. At the presentation reception I was talking to a guy and asked him if he minded that I smoked. He said 'No, go ahead. But don't you find it difficult being in a country that is so anti-smoking'. I said, 'Not really. I normally only relax with a fag or two after work'. Realising my linguistic faux pas at seeing the alarm on his face, I desperately searched for a common word to explain what I meant. 'I really meant to say butts. It is so difficult when you are using a different tongue'. He did not seem impressed.

And here is some interesting 'butt' information