[JeddHampton]

I'm currently reading a book written by the guy who created the Dothraki and High Valerian languages for Game of Thrones. He had to make what already existed in the books for, so there were a few things already set.

He was a consultant in the show as well as he was the one who had to get the actors to speak it well.

The book is called The Art of Language, and if you have an interest in conlangs, you should give it a try.