The phrase "Lisan al-Gaib" comes from Frank Herbert's Dune and is prominently heard in the recent Dune films, especially in scenes involving Stilgar and Paul Atreides. Online, the line took off as a reaction sound because its serious, messianic tone contrasts perfectly with trivial clips and overblown praise. It became especially popular in short-form video edits where users frame a correct guess, lucky moment or suspiciously perfect timing as destiny. Fans who like this dramatic reaction style also use the bruh meme for a more blunt punchline.