I can't think of an interesting and important question one could ask a non-human, except (if it's an alien) "how to do cold fusion" or "how to live forever", ie specific technological stuff.

Really, what do we expect to hear from monkeys and dolphins deciphering their language? Give them a small talk on the current Bitcoin prices or ask what they think about the next elections? I suspect in the end it'll lead to something like "How are you? I'm fine!"

Maybe it's just me though.