In a way, this happened to my daughter. She is studying in a foreign country, the courses are in English (not our native language), and of course she is writing all her papers in English, too. Which she is very good at, so the texts are usually perfect from a language point of view. She had already been rated "native speaker" in school although she actually isn't, and worked as an editor on an English language story website back then, fixing American and British native speakers' spelling problems).

Other students actually asked her what AI she was using to write her papers. Guess who was seriously pissed...