I've proposed this a few times, as someone whose second language is English, I can see people learning English with AI, same with teens in school. I used spellcheck in Firefox (back in the mid 2000s) to teach myself how to spell more words instead of just relying on it and forgetting about the corrections.

We are and will reach a point where more and more people speak like, and sound like AI talks. The assumptions that something is AI are going to become really useless without further evidence.