I recently read a paper[0] that claimed to have decoded the basic building blocks of Sperm whale language. I went and took a look at the github for the project CETI and found that most of the code was for the whale trackers and hydrophones. It seems like there are a lot of pre-requisite problems that you have to solve to even get good whale recordings.
On the other hand though, whales probably don't rely on body language since they are communicating way out of line of sight. So it may be easier in that regard.
Anyways, I am convinced that we will figure out how to teach some basic human concepts (like self) to animals and the intelligence of even "stupid" animals like chickens will make people more reluctant to eat meat.
[0] https://www.nature.com/articles/s41467-024-47221-8#:~:text=S....