Dargwa or Dargin is a North East Caucasian language with about 439,000 speakers, most of whom live in the Russian republic of Dagestan. There are also Dargwa speakers in the republics of Kalmykia, Khantia-Mansia and Chechnya, in other parts of the Russian Federation, and in Azerbaijan, Kazakhstan, Kyrgyzstan, Turkey, Turkmenistan, Ukraine and Uzbekistan.
Dargwa was written with the Arabic alphabet 1926, when the Latin alphabet was adopted. Since 1937 a version of the Cyrillic alphabet has been used to write Dargwa.
Information about the Dargin/Dargwa language
http://en.wikipedia.org/wiki/Dargwa_language
http://www.ethnologue.com/14/show_language.asp?code=DAR
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