I’m sure a linguist could dive way more into depth, but “not English words” is the equivalent of “not a true Scotsman”.
Pretty much. Once speakers start using the word, and expecting others to understand it, it’s already part of the lexicon of that language. Specially if you see signs of phonetic adaptation, like /ø/ becoming /u:/ in a language with no /ø/ (see: “lieu”) - and yet it’s exactly why people complain about those words.
And this sort of complain isn’t even new. Nor the backslash agianst it, as Catullus 84 shows for Latin and Greek.
That reinforces what you said about being very likely in the autism spectrum - when I say “most people use implicatures all the time”, the exceptions are typically people in the spectrum. Some can detect implicatures through analysis, and in some cases they have previous knowledge of a specific implicature so they can handle that one; but to constantly analyse what you hear, read, say and write is laborious and emotionally displeasing, it fits really well what you said in the OP.
(Interestingly that “all the time” that I used has the same implicature as the “all the millionaires” from your example - epistemically, the “all” doesn’t convey “the complete set without exceptions” in either, but rather “a noteworthy large proportion of the set”. “Boo millionaires” is also a good interpretation but it’s about the attitude of the speaker, not the truth/falseness of the statement.)
This conversation gave me an idea - I’ll encourage my mum (who’s most likely in the autism spectrum) to give ChatGPT a try. Just to see her opinion about it.