Whale Language on Duo Linguistics

The Navi are pets for whales which is true. He's talking to the whale who clearly has some understanding of what he's saying. The whole idea of this franchise is like they can connect with the wildlife through their hair connection right? I think that makes sense it's like a telekinetic like link I get that partthey're not doing that, the whale is just making noises and subtitles are coming up as the whale moves at him.