Someone needs to pay way more attention to the network than he does because that's news to him, "The World Eater's have their own language?"

Older lighthouse keepers. It certainly makes sense that Robin hasn't been the only one and there's been a long succession, but he hadn't really considered what that truly meant or how many resets there had been. He'd taken what Robin had said in her post at face value and not really thought deeper about it.

Mostly because he didn't enjoy talking to her.

"Maybe there are more commands in their language. One that has made them attack like this."