Gwenithen is the dominant language of the Special Province of Gwenith, as well as the Special Autonomous Provice of Athanith and the District of the Isles, as well as the language of the Gwenithen People. It is the only official language of the Gwenithen Empire.
The language is closely related to Arenian, and more distantly to Enlylln.
Gwenithen has four indicated cases, Nominative, Accusative, Dative, and Genative, each indicated by a suffix, with a seperate suffix for plurality, and three grammatical genders, though two are identical in declension, with separate articles.