776,000 (1990 census).
Mindanao, almost entire expanse of Lanao del Sur Province; Lanao del Norte Province, southern half, north of Lake Lano; northwest Maguindanao Province, Matanog, Bariya, Buldon, and northern Parang municipalities; North Cotabato (northwest) and west central Bukidnon provinces.
4 (Educational). De facto language of provincial identity in Lanao del Sur.
Latin script [Latn].