Which Caucasian language has the greatest number of speakers?

The most important and widely spoken Caucasian language is Georgian. It belongs to the Kartvelian (South Caucasian) family, which also includes Mingrelian, Laz, and Svan.123

In the mid-1990s, the total number of speakers for the entire Kartvelian group was approximately 4.2 million. While the Caucasian languages collectively have about 8 million speakers, individual language communities vary significantly in size, ranging from a few hundred people to millions. Other notable languages within the broader group include Chechen (with 890,000 speakers) and Ingush (with 210,000 speakers), both of which are part of the Nakho-Dagestanian family.234