English is a strange language, whether it's British or American English. I once possessed a list of all the quirks in English, like:
Why is it one mouse, two mice
Why is it one louse, two lice
Why is it one house, but not two hice?
The point was raised by Yasmin and a few other (British) bloggers about the differences between American and British spellings. In the USA, you tend to reduce the 'ou' in (e.g.) colour to 'o' as in color. Another disparity is turning the 's' in organisation to 'z' (organization). To be honest, this is something that I tend to ignore. I note it, but don't take issue with it.