I never realised till I did my TESOL course, that the Americans have different verb forms. Where we would say 'If I had known that, I would have done something else' Americans would say 'If I would have known that , I would have done something else. They do seem to use more words that us, such as 'listen up' instead of just 'listen'.
As for the French using English words, I have to laugh at the Academie Francais (sp?) getting all upset, trying to keep the language pure, while the French people cheerfully ignore them, using as many English words as they want. Well, it's poetic justice I suppose, seeing that their language infiltrated ours via the Normans after 1066.
Mind you, I do love our hybrid language, with all the different words for the same thing. We can be really subtle (well, some can, but I'm from Yorkshire where we do more Anglo Saxon than subtle. I'm afraid!)