Yes, for sure a whole lot has been learned about whale and dolphin languages, including some having self identifying sounds, both on individual as well as group levels. They also have hierarchical languages and combine sounds like we do in sentences, but also they combine sounds over top of each other similar to what beatboxers do.

I absolutely agree, human-exceptionalism causes such a blind spot in modern societies attitude towards animals. It would be so amazing to see this blind spot go away.