Abkhaz is one of the Northwest Caucasian languages, which once included Ubykh (now extinct), holder of the most consonants ever noted in a language (81).
What a shame. How could they let such an awesome language die?
The Ubykhs are Muslims and left Caucasus for Turkey in 1864 after the Russian conquest. They stopped being nomads and became farmers in western Turkey (around Manyas).
To avoid discrimination their elders encouraged Ubykhs to assimilate into Turkish culture. The last native speaker died as recently as 1992.