Sylheti is often either considered a dialect of Bengali (Bangla) or an Assamese language due to many similarities between the languages, and also often considered a separate language due to significant differences between them all. Given that Sylhet was part of the ancient kingdom of Kamarupa,[1] the language has many common features with Assamese, including the existence of a larger set of fricatives than other East Indic languages. According to Grierson,[2] "The inflections also differ from those of regular Bengali, and in one or two instances assimilate to those of Assamese". Indeed it was formerly written in its own script, Sylheti Nagari, similar in style to Kaithi but with differences, though nowadays it is almost invariably written in Bengali script.[3]
Sylheti is distinguished by a wide range of fricative sounds (which correspond to aspirated stops in closely-related languages such as Bengali), the lack of breathy voiced stops seen in many other Indic languages, word-final stress, and a relatively large set of loanwords from Arabic, Hindi and Persian. Sylheti is spoken by about 10 percent of Bangladeshis, but has affected the course of standard Bengali in the rest of the state.
Sylheti is the language of the Surma river valley region bordering what are today the nations of Bangladesh and India. Sylheti is spoken throughout Sylhet Division in Bangladesh (comprising the districts of Sylhet, Habiganj, Moulvi Bazaar & Sunamganj). It is also spoken across the border in the Barak Valley region of Assam in India. The Sylheti Bangladeshi diaspora community in the United Kingdom also speaks Sylheti as the language of preference and services are provided to cater to their needs.[1] There are over 10,000,000 [2] speakers of the language throughout the globe, including 8,000,000 speakers in Bangladesh. [3]
The Sylheti language is written in the Sylheti Nagri script[4]. Sylhet has a rich heritage of literature in the Sylheti Nagri script going back at least 200 years. [5]. The Sylheti Nagri script includes 5 independent vowels, 5 dependent vowels attached to a consonent letter and 27 consonants. [6]. The Sylheti Nagri alphabet differs from the Bengali alphabet as it was derived from the Kaithi script of Bihar. [7].
Up to 1970's, the Sylheti Nagri script [8] was used to write the Sylheti language. The government of the newly formed Bangladesh discouraged it’s use in favour of the Bengali alphabet. Efforts to establish Sylheti as a modern language were vigorously opposed by the political and cultural dominance by successive Bangladeshi governments. [9]