There are large datasets of bird sounds (eBird, Cornell Labs, etc), but the descriptions are usually limited to the species, location, and something like “mating call” or “contact call”. Hugely useful for building models that can recognise birds by call (apps like that already exist, I recommend Merlin Bird ID), but definitely not enough for something approaching actual translation.

FWIW there’s no research to indicate that the sounds birds make are what we’d call language. They’re avid communicators, and some species are known to be highly intelligent, but of course it’s not like “caw” means “to fly” and “craah” is “forward”.