Examples of Dark Tongue runic script used by the sorcerers of the Thousand Sons Traitor Legion.
The Dark Tongue is the arcane language of Chaos Daemons and the mortal forces of Chaos. A ritual language, its phonetic runes are the only manner in which the mysteries of Chaos can truly be expressed. The Dark Tongue is the native language of Daemons and other Chaos entities with the power of speech.
Chaos Sorcerers in general and the Chaos Space Marines of the Thousand Sons Traitor Legion in particular strive to learn this arcane language for the conjuration of Chaos entities and to bargain more effectively with Daemons when they are summoned.
Sources[]
- War Zone Fenris - Wrath of Magnus (7th Edition), pg. 131