If children are taught to read by AI there is no shot they don't teach them wrong and change language forever.

Clearly language is already doomed judging by this post
- Yeah, dude, they're training on this shit.
  
  So you're creating the doom you're prophecising?
  Nicely played.

Do you really assume that language does not change if there is no AI involved in teaching? Try reading texts from a century – or even 50 years – ago.
I am not an AI fan but your argument is just fearmongering.
- What's fear mongering your only telling me I'm right?
  
  My only what?

The rich will have actual human teachers, but the poor will be trained by AI. The result will be language diverging into two Eloi/Morlock-style subpopulations.
Though given that people acquire language from their peers, and invent what they need, Poorish will have a bland, almost mechanical formal register, and a lot of incomprehensible-to-outsiders slang about actual life stuff.
- Newspeak double plus good.
  
  Oh. Duckspeak. Ungood bellyfeel.

Well, look at USA alone and tell us how many accent they have. Globally there's like two way to pronounce the word "Herb" and "Data" and "gif"(pronounced like giraffe) and many other word, people still fighting over it yet there's no "correct" way to pronounce, both are legit. There's also the whole thing with dialect. Language, pronunciation, and all those thing, its always start from reading it wrong(as in not intended way), then people are taught the same thing on that region, then it became an accent or dialect or what have you. Turning back the clock 200 years from now, i'm pretty sure they talk differently.
This isn't in support in AI replacing teacher though, as learning lips movement is very important in teaching pronunciation. People talk differently because their lips and tongue move differently, and AI can't do that. They make sound with speaker, not manipulating how air leave the throat.