In Korea, people call the AI writing style "쇠맛 the taste of metal.(or metallic taste)" They say it tastes like a machine.
When Koreans generally define the metal taste, they usually put it something like this: "The plot is terrible, but the sentences are really excellent and refined."
Generally, unless you're using a fine-tuned local model, sentences with that metal taste are considered refined. So there's this irony where people say writing not done by AI lacks refinement.
In fact, even very famous Korean authors have been caught using AI, but people didn't really notice—they just felt the prose had become very elegant.
Anyway, I'm rambling, but the thing is, AI sentences were basically "learned and erudite" by default. When I entered grad school in Korea, I was taught where to use hyphens, told these were "things you need to learn when writing papers," and learned language techniques while being taught how to write papers—and AI uses those techniques really well. So it's ironic.
It's just a shame that in order to avoid writing with that metal taste, you have to avoid the very vocabulary that used to be recommended.