Arse or Ass?

@cole Said
alot of ppl probably don't say a** in the UK because it could mean you are referring to someone as a donkey type animal, arse is more appropriate if you mean the rear end

@the_lone_wolf Said
It might be because of the people in the UK's accent

@usa Said
"More importantly, how did we get a** from arse? British English speakers still spell it arse, but as they are non-rhotic (not pronouncing r's between a consonant and a vowel) it comes out as "ahss". That approximate pronunciation was kept in the U.S. but the spelling was changed to match it."
https://www.takeourword.com/TOW183/page2.html

@usa Said
"More importantly, how did we get a** from arse? British English speakers still spell it arse, but as they are non-rhotic (not pronouncing r's between a consonant and a vowel) it comes out as "ahss". That approximate pronunciation was kept in the U.S. but the spelling was changed to match it."
https://www.takeourword.com/TOW183/page2.html