British vs. American English: Which one?

[quote=“almas john”]American English is standard in Taiwan, but it’s only a little harder for non-North Americans to find work. American English is what the kids learn at school and almost all cram schools.
[/quote]

That’s been my general impression, but from what I read around here, issues like in
[Class singular or plural
don’t seem to exactly be rare.

Are such situations exceptions where British English is preferred? Or, are the teachers themselves confused about the distinctions?