Background: We wanted to scout an island. To do that we thought about using the Conjure Animals spell to summon a bird that could speak, and using Tongues to communicate with the bird after it had returned from scouting. The only bird with a language we could find was the Giant Eagle.
My question is: since Conjure Animals doesn't actually conjure the beast, but a fey, do the fey creatures also inherit the beast's language?
I know this question (Communicating with Conjured Creatures) asks about communicating with beasts already, but I couldn't find an answer to whether, if a beast does know a language, the summoned fey also inherits this language.