Primordial was the language of primordials and elementals. The Giant language was a debased form of it. The Abyssal language was a form of Primordial warped and twisted by the evil of the Abyss.
It was also considered a language family, so that the elemental languages Aquan, Auran, Ignan, and Terran were considered a group of dialects of Primordial. They were sufficiently similar that creatures who understood one of those dialects could understand the others as well.
- Mike Mearls, Jeremy Crawford (2014). Player's Handbook 5th edition. (Wizards of the Coast), p. 123. ISBN 978-0-7869-6560-1.
- Rob Heinsoo, Logan Bonner, Robert J. Schwalb (September 2008). Forgotten Realms Player's Guide. (Wizards of the Coast), p. 156. ISBN 978-0-7869-4929-8.
- James Wyatt (June 2008). Dungeon Master's Guide 4th edition. (Wizards of the Coast), p. 171. ISBN 978-0-7869-4880-2.