David J Peterson created the Dothraki and High Valyrian languages for HBO's Game of Thrones. He's a conlanger (CONstructed LANGuage) by trade, who makes a living by creating languages for mainstream films. He has authored three books related to conlanging, been an executive producer on the Conlang documentary, and produced languages for numerous movies and TV shows. Follow the Hypnothesis Podcast on Instagram and Twitter @hypnothesis_pod