User blog comment:IWander/Hey/@comment-26990157-20160923143835/@comment-29061305-20160923201018

I don't want a nationalism argument, but I'm not sure that's true. America may have more people than Britain, but British spelling is also used in Australia, New Zealand, South Africa and to some extent Canada. They're roughly equal.

This discussion has been going on at Wikipedia since 2001, and they've reached a kind of truce. Basically, articles on British subjects (such as LittleBigPlanet) use British English.