Back in 2018, I interviewed language creator David J. Peterson about how he invented Dothraki for Game of Thrones and other fictional languages in fantasy worlds. David and his wife Jessie just finished a huge project – developing the Fremen language for Dune: Part Two. I talk with the couple about their creative process and the challenge of imagining simple English phrases in the Chakobsa language that Frank Herbert imagined in his Dune novels. We also hear my 2018 episode, “Do You Speak Conlang?” where I also talked with Marc Okrand, inventor of the Klingon language, and Robyn Stewart, a language consultant for Star Trek: Discovery. Plus, Jen Usellis -- a.k.a. Klingon Pop Warrior -- will give you a serious case of earworms (not the kind from Wrath of Khan.)