American vs British English?

Is there any way to change your native language to British English? There are just a few words that are annoying because I have to think harder to get it from American into regular English before translating to French. For example, Autumn ( the season ) shows up as fall, and I’ve never heard that in my daily life, and the French word is super similar to Autumn. I’m not British but I know my own English dialect could never make it to Duolingo so British is next best thing

edit - oops about the ‘regular english’ I meant British english