13,000,000 (2006 SIL).
3 (Wider communication).
Not inherently intelligible with Bengali [ben], although considered a nonstandard Bengali dialect. Dialects form a continuum from north to south, with a larger religious distinction between Muslim and others. Rohingya [rhg] in Myanmar is similar to the southern dialect of Chittagonian. Lexical similarity: 43%–64% with Bangla [ben].
Home, family, religion. Village women without access to TV do not understand Bengali [ben]. Educated people understand Bengali. Education is in standard Bengali. 60% are bilingual in Bengali.
Muslim, Hindu, Christian.