American vs UK English

I would like to see an option to opt for UK English spelling, instead of American.

This bay seem like small, even petty request, but in a game that relies entirely on text, spelling and grammar are important. Constantly seeing the American spelling for certain words is annoying because it always trips my spell checker and gets highlighted in red, it's very distracting.

I can be quite pedantic about this kind of thing, but I would be very grateful for a simple fix.