L1 users: 890,000 (2003).
Kalimantan Tengah province: Gunung Mas, Kapuas, Katingan, Kota Palangkaraya, Kotawaringin Timur, and Pulang Pisau regencies; headwaters of Kahayan, Kapuas, Katingan, and Mentaya rivers.
3 (Wider communication). Widely used as LWC for trade in much of Kalimantan, from Barito to Sampit rivers. Used in many domains (church, school, village-level government, market, etc.).
Latin script [Latn].