Excuse me, but if I had never mentioned that I'm an
American in any of my previous nodes, and never given any hint otherwise besides my spelling of the word "
color", would you be able to tell what my nationality was? No, you wouldn't. If I were to go to
England, I would have no problems communicating. Of course, they would be able to discern that I was an
American, but seriously. Every language has some regional difference in pronunciation. That doesn't make them separate languages.
And really, enough with the "We're from England, we invented the language,". No nationality invented English. English is a conglomeration of Old Norse, French, and Latin, among others. If you're talking about a country like Japan, whose language developed in relative isolation compared to historical Europe, then maybe. But no Indo-European language is without its peers and influences. So, you didn't invent the language. Neither did I. If you want to argue with Hänor the Viking about how to spell "color", be my guest.
Americans speak English. Any official demographic study will confirm this. There have been times where a language has splintered off entirely different offspring - as Latin to French, Spanish, Italian, Portuguese, etc. However, remember that this happened in a time when there was no mass media, no international travel. It was the dark ages, where people lived in isolation from the rest of te world, and isolation always breeds evolution of language. Isolation is something quite lacking from today's world. Thus, it is unlikely that the English spoken in America will ever be different enough from the English spoken in Europe to be considered a different language (while any of us are alive).