There are two words "Ass" and "Arse", I heard that but I am not sure, "Ass" is only using in American English, not in British English. And "Arse" is only using in British English, not in American English, is that true? If someone is saying "Ass", "Asshole" or "Ass" related words, can I say that he/she is American? If sometimes is saying "Arse", "Arsehole" or "Ass" related words, can I say that he/she is English? Please advise.
Certainly, if you hear someone refer to that area of the human anatomy as 'fanny' then you know s/he is American.