@Cernel depends what part of the US for pronunciation. My point is the colonials seemed to spell however and that is in part due to the first dictionaries that gave any kind of authoritative spelling only coming out in the 1800s. Before then nobody could say one way was more correct.
With regards to official language, there is none in the US. It is a cultural point as some are trying to make English the official language to effectively racially discriminate. That kind of law would make translators unavailable and officials forms and documents available only in English .
I think we perhaps should draw this discussion back to the game. The consensus is to favor american spelling of words (so color, not colour) for consistency. This really will apply to future work, existing maps are too many to change, coordinating that change across differing engine versions is also a mess. Just changing it would break a lot of maps for a lot of people.