The Joosian language, also known as Giuzzan (lingua Giuzzanna or Giuzzanno) is the official language of Joos. Originally a pidgin used by the colonists who first arrived in 291BP, and who were often of different parts of Southern Longerath, speaking different Liliance languages, Joosian developed into a tongue in its own right shortly before the Plague.

Silly stereotypical hand gestures are also a common element of the Joosian language.

[TECH: Joosian is the equivalent to the Italian language.]