[famouswaffles]

>Just because a children's story, for example, is "simple" doesn't mean it isn't inflected by human complexities.

Sure. And again this is why lots of people say recommending a Children's book or show is really a bad idea for beginner learners. Graded readers are an entirely different thing from children's fiction.

>Would you trust an AI to present you with accurate language patterns--speech, vernacular, etc?

Language patterns in text ? Yes. There's nothing special about it lol. For all of GPT-4's misgivings, "wrong" language patterns for English isn't one of them. How it writes usually is just the default hammered in by RLHF and can easily diverge when instructed. So if a native in some other language gives the A-Ok on a piece of text then that's it.