Why exempt people who use English as a second language? Anyone with a level of proficiency sufficient for reading the comments here can manage writing English at a passable level. If that takes effort and requires looking up idioms or words, then good! That is how you learn a language — outsource that and you don't. It won't stick even if you see what is being output.

I don't care if they use an LLM to ask questions about grammar or whatever, as long as they write their own text after figuring out whatever it was they were struggling with.