Yes. And this result is comming from that project.
Gašper Beguš who is the linguistics lead of Project CETI is the first author of the paper this article talks about.
If nothing else it has a fantastic name
I’m not sure how you would go about attributing meaning to the sounds. Usually you need labels for that sort of thing. With current techniques we might be able to predict which sounds come next, but we still wouldn’t know what they meant.