15,000,000 (1983 SIL). At least 1,000,000 in Bangkok. Kalerng has a few thousand speakers (1990 A. Diller).
Northeast; 17 provinces. Kalerng subdialect: Sakon Nakhon and Nakhon Phanom.
6a (Vigorous). De facto language of provincial identity in east, northeast provinces.
Central Isan (Kalerng, Kaleung, Kaloeng), Korat, Northern Isan, Southern Isan. Korat dialect is quite different, and may be a separate language.
88% use Isan dialect in the home, 1% use Central Thai, 11% use both.