Tsez is a Northeast Caucasian language spoken by about 7,000 people in the Tsunta district of southern and western Dagestan in Russia. The name Tsez, which is used for both the language and the people who speak it, comes from the Tsez word for eagle. In Georgian, the Tsez language is known as დიდო (dido).
When Tsez is written, which is not very often, it is usually written with Cyrillic-based spelling based on Avar. Tsez is not taught in schools, but Avar and Russian are used instead.
Information about the Tsez language
http://en.wikipedia.org/wiki/Tsez_language
http://www.ethnologue.com/show_language.asp?code=ddo
Sample texts in Tsez with audio and translation
http://ling.ucsd.edu/~polinsky/tsez.html
Information about the Tsez/Dido people
http://www.eki.ee/books/redbook/didos.shtml
Northeast Caucasian: Aghul, Akhvakh, Archi, Avar, Budukh, Chechen, Dargwa, Godoberi, Hinukh, Hunzib, Ingush, Khwarshi, Lak, Lezgian, Tabassaran, Tsez, Udi
Northwest Caucasian: Abaza, Abhkaz, Adyghe, Kabardian, Ubykh
South Caucasian (Kartvelian): Georgian, Laz, Mingrelian, Svan