I found this on imdb.com, hope it helps: The words chanted during the "Duel of the Fates" are from Robert Graves' poem "The White Goddess". "The White Goddess" is a translation of the original version, "Cad Goddeu" or "The Battle of Achren", an early Celtic work of great antiquity also known as "The Battle of the Trees," which was originally composed by Gwion and is found in the "Book of Taliesin", a Thirteenth Century Welsh manuscript . John Williams had the lines "Under the tongue root a fight most dread, and another raging, behind, in the head" translated into Sanskrit. The translation sung in the movie is as follows: "Korah Matah Korah Rahtahmah Korah Rahtamah Yoodhah Korah Korah Syahdho Rahtahmah Daanyah Korah Keelah Daanyah Nyohah Keelah Korah Rahtahmah Syadho Keelah Korah Rahtahmah Korah Daanyah Korah Rahtahmah Korah Daanyah Korah Rahtahmah Nyohah Keelah Korah Rahtahmah Syadho Keelah Korah Rahtahmah Korah Korah Matah Korah Rahtahmah Korah Daanyah Korah Rahtahmah Nyohah Keelah Korah Rahtahmah Syadho Keelah Korah Rahtahmah Korah"