That seems utterly bizarre to me. I don't use "delve" frequently myself, but it is common enough that it doesn't jump out as an unusual word. Perhaps it is overused or used in a not-exactly-usual context that tips one off that it is LLM-generated, but by itself it signifies nothing to me.
It is a very common word used in Nigerian style English which was a very common place they were outsourcing RLHF tasks to. A sibling comment has a link but it is also easy to google.
