I am British and am trying to learn Japanese but am sometimes confused by American English spelling, words and phrases. Is there a British English language version available?
One of the biggest issues is likely the fact that default answers tend to be overly colloquial. If they favored proper English many of these issues would be moot. Differences in spelling, however, should be added gradually (one would assume). Like it or not, your understanding of contemporary American English will likely improve.
If team Britain reports 'My answer should have been accepted' often enough the change might be expedited.