I've said it before, and I'll probably keep saying it forever: bad writing predates AI. Overly verbose writing predates AI. Not all the bad writing you see is AI, lots of it is still the good old fashioned kind.

Not that inserting an aside about a different language is bad writing. It's also weird enough that it's exactly what I would not expect an AI to do (except perhaps under very odd and specific circumstances). "It's clearly AI" has become a catchall for any writing that people find even mildly bad or surprising.