Tieflings might have traditions influenced by their infernal heritage, including rituals of infernal pact-making, ceremonies to honor demonic ancestors, and festivals to commemorate significant events in their history.
Tieflings might speak a language tinged with infernal accents, dark metaphors, and arcane symbolism. They might also use secret codes or cryptic messages to communicate with others of their kind.
Tieflings might create art that reflects their inner turmoil, struggles with identity, and fascination with the dark and forbidden. They might produce works of literature, music, or visual art that explore