Earlier quoted context omitted.
Huh, the article immediately suggests a related question to me: > BTW, the feminine version of a restaurateur was “restauratrice.” That makes perfect sense, since the feminine agentive suffix in Latin is -rix. But I thought the feminine agentive ending in French was -euse! Where did we get "masseuse"? Wiktionary suggests that -euse is an alternate equivalent of -rice, derived from Latin -osus (which has no agentive m…
I cannot really come up with a good rule, but I notice that words in -teur seem to have a féminin in -trice (restaura-teur/-trice, ama-teur/-trice, institu-teur/-trice, anima-teur/-trice) while other -eur words seem to prefer -euse (mass-eur/-euse, football-eur/-euse, arnaqu-eur/-euse).
I've heard at various times in my life the various feminine endings applied to same profession - people playing around with what sounds good or a generational thing. -esse -ice -enne -euse
There's also the debate in gendered languages over whether one should never use feminine endings on professions, and keep them generic, or always use them for all professions for consistency, avoiding suggesting certain professions are male vs female, while ensuring women are visible in professions where they used to be rarer.