I also tried aperitif for appetizer although it specifically refers to wine served as an appetizer.
Wiktionary defines it as we do in French:
"(idiomatic) A shared spirit of comradeship, enthusiasm, and devotion to a cause among the members of a group, for example of a military unit."
The quiz is not about translation, it's about common English use of French phrases, regardless of their literal meaning.
but to the rest of us slobs, it merely means a feeling of fellowship shared by members of a particular (ANY particular) group.
PS not a complaint, but just pointing out that this quiz (obviously) is still in favour of englishspeaking countries.
I think we only have: chauffeur ( but we use it as driver in general like in busdriver it is bus chauffeur) dejavu, alacarte (but mainly in french restaurants so not sure if that counts..) femme fatale, though I havent really heard anyone say it. I think it saw it written somewhere once though. And I guess some say bon appetit.
The clue made it seem like they were richer than bourgeois