Also available are grammar guides for the Yán Koryáni and Livyáni languages which are spoken in two other of the "Five Empires" of the known parts of Tékumel, as well as grammar books for Engsvanyáli and Sunúz. These two languages are now extinct, dead languages. Engsvanyáli is of use as it is the root language for Tsolyáni and many of the other currently spoken languages of the known parts of Tékumel. Sunúz is of interest because, although it is obscure, it is quite useful for sorcerous purposes. For instance, Sunúz contains terms to describe movement in a six-dimensional multi-planar space, something of use to beings who visit the other planar realms where "demons" live.