Koru is home to a huge variety of languages. All descend from three celestial languages: Sidereal (more commonly known as Old Tongue), Draconic, and Eimatxya Fenhairu.
The language of Katşetzekzalana and her servants, spoken in most parts of the Inner and Underworld
The language of the Haborians
Old Tongue, the language of the first age and of the Korsamu, Maruthar, and Leru
An overview of the writing systems of Koru