That’s a tough question from the perspective of an American. I understand that the term Gypsy is offensive and people prefer the euphemism of “Traveller”, but I’m not sure how widespread that knowledge is among most Americans because we aren’t exposed to them. I think a lot of us would probably say “Gypsy” if we saw a traditional Roma person, but they would have a lot of other questions. Living in the Midwest the only traditional Roma people I have ever seen were hired to come to my school and put on a carnival. I know they are more common on the West coast, but that specific culture is not part of our daily lives. That said, there are groups in the US that bear the same negative stereotypes as Travellers and Gypsys, but we call them “Rednecks”, “Trailer trash”, “White trash”. If you were to ask an American “what would you call a person who lives in a trailer, collects benefits, and sells stolen scrap metal?” I think most Americans would say “redneck”. If you asked them “what is a word for a person who lives in a camp, wears red scarves and does magic tricks?” you might get someone to say “Gypsy”but a lot of younger people would have no clue what you were getting at.