Internal Classification
Among the linguists who support the North Caucasian hypothesis, the main split between Northeast Caucasian and Northwest Caucasian is considered uncontroversial. Problems arise when it gets to the internal structure of Northeast Caucasian itself. So far no general agreement has been reached in this respect. The following classification is based on Nikolayev & Starostin (1994):
- Abkhazo-Adyghean
- Hattic
- Nakh–Daghestanian
- Nakh
- Hurro-Urartian
- Daghestanian
- Avar–Andi–Dido
- Lak–Dargwa
- Lezgic
Read more about this topic: North Caucasian Languages
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