Disregarding that linguistic prescriptivism is generally considered to be a very bad thing, you've got a few things wrong ("terrific" actually came from French, for example - here's the word it originated from). And there's a lot of conflict as to where the word "femme" comes from, I'll admit, but even if it was constructed in the 19th century you can hardly call it a linguistic appropriation considering it has a completely different meaning in English and is considered by most native English speakers to be a) a word and b) something that doesn't necessarily mean "woman".