My problem with Duolingo, as an English person, is the ‘English’ is actually American English (even uses a US flag!) and sometimes marks my answers as wrong whe

My problem with Duolingo, as an English person, is the ‘English’ is actually American English (even uses a US flag!) and sometimes marks my answers as wrong when they are actually correct in English! Some of the required responses aren’t even English (e.g. “the books had gotten lost”). I would really appreciate it if they could allow actual English answers as well as American English ones.