Morsin code: A low bandwidth encoding schema used for long-distance communications, developed by an Imperial military scientist Samuil Morsin.

Imperial underworld: Fenya (or Blatnoy slang, from hadagan. “blatnoy” – professional criminal)

Džun: Džunic

Aviacs: Avian

Ogres: Ogric sign system

Dead Sea Freeborn: Freeborn Slang

The Littlefolk: Birchtongue (Lesoviki), Mountongue (Zwerge), Kelpyt (Vodyaniki)

The Lizardfolk: Hisss

Trolls: Seismic communication (available through seismic magic, such as Tremor Signs spell)