The Western Boro dialects are spoken in the districts of Kokrajhar and Bongaigaon. The Eastern Bodo dialects are found mainly in the districts of Barpeta, Nalbari and Kamrup and some parts of Darrang. The Western Boro dialect has gained the status of a standard dialect. It has also developed a written form. The variations between these two dialect groups are mainly phonological and lexical.