Doesn't matter though. I've gotten so used to writing in US English that it looks weird when I write in British English, and all my settings on my computer autocorrect it to US anyway, even when I'm writing something like this in Safari, so it'd be a faff to change it. And the choice of language kind of has to be American anyway. I think it might seem jarring for the narration to be in one and the characters speaking in another.
He opened the wardrobe. "Your closet is empty," he said.
Edgar turned on the cold tap and jumped back in horror. "Sam, why the fuck is there blood coming out of the faucet?!"
Or something like that. It sounds like some Americans have come to England and are experiencing a language clash. It's best to get into the habit of one and stick to it. I do worry about messing up though, like I'm fairly sure the things I write sound correct and natural, but it;s all from watching TV and picking up on the way people speak and the words they tend to use. One time I spent about an hour trying to work out why cupboard (as in a small cupboard in the kitchen) didn't sound right and what I should use instead. I settled on cabinet eventually.
Anyway, the point of all this is that if I ever do get around to writing something original, it's probably not going to be set in California, and I wonder if I'm going to have trouble switching languages.
Anyhoo, that's my random rambling for the night.