How to Make a Bat Language

There are definitely con-langers who think that is the fun part and would like, you know, some way to go into that. And so it's cool if there's no idea that does that. I've seen alien languages that could not be pronounced put into books. That's definitely something that you can do. There's ways I have one language that has a tone that humans cannot pronounce. I could probably do some sound effects to make it work. It's very... Yeah. But yeah, I would do like, I would be very happy if your expansion included bats. ...I would make the bat language for you guys if you wanted me to."