Wikipedia maintains a list of smells for LLM text.

https://en.wikipedia.org/wiki/Wikipedia:Signs_of_AI_writing

Not really but they jump right out at you after a few minutes chatting with it. I also asked the AI and it was pretty subjectively accurate, especially if you force it to cross reference with web searches and especially google's ngram corpus (you can readily see that 'delve' and some of the other rhetorical constructs are quite uncommon in human speech)