L1 users: 125,000 (2011 SIL).
Zamboanga Peninsula region: Zamboanga del Norte province, Labason town to southern border, mostly inland on Zamboanga Peninsula western slopes; Zamboanga Sibugay province, Ipil, Rosseler T Lim, and Tungawan municipalities on eastern slopes of peninsula.
Siocon, Western Kolibugan (Western Kalibugan). Lexical similarity: 89% between Siocon and Western Kolibugan dialects.
VSO; prepositions; genitives after noun heads; articles, adjectives, and numerals before noun heads; relatives before noun heads, and relatives without noun heads; question word in sentence-initial position; 2 maximum prefixes, 3 maximum suffixes; word order distinguishes subjects, objects and indirect objects, given and new information, topic and comment; affixes do not indicate case of noun phrases; verb affixes mark number; ergativity; passives; causatives; comparatives; CV, CVC, CVV, CCV, CCVV, CVVC; nontonal.
Latin script [Latn].