If so, that "convention" will lose you an awful lot of students. For me, there's nothing worse than Americanisms corrupting the English language... and I'm not even English.
This sentiment has no place on a language learning website. England doesn't own the language just because it's named after them, and the language has changed just as much in England as it has in America since the dialects split. All dialects are equally valid, from RP to AAVE. This isn't just my opinion, this is the stance of science.
I read your comment wrong my bad! I am from Scotland and I've been speaking gaelic my whole life. Calling them pants and not trousers is just wrong in my opinion but I see what you mean about being accessible to everyone. I thought I'd try out the app because I've stopped using gaelic in recent years and just wanted a refresher :)
But translating "pants" into "drathais" was marked wrong - which, AFAIAC, is wrong..