The trailer for “Dune: Part Two” showcases Timothée Chalamet as Paul Atreides, delivering an intense speech in an intricate, constructed language. Its creation by language wizard David J. Peterson mirrors the intricate world-building of Denis Villeneuve’s adaptation. Peterson, known for High Valyrian in “Game of Thrones,” crafts languages that are more than mere gibberish, adding authenticity and depth to fictional realms. While the Hollywood trend of conlangs may enhance immersion, Peterson’s commitment to authenticity sometimes challenges the source material, as seen with High Valyrian. His meticulous approach to crafting languages unveils the complexity and evolution of linguistic systems.
https://www.newyorker.com/culture/cultural-comment/dune-and-the-delicate-art-of-making-fictional-languages