
The original name of the language we speak, not it is not sylheti.
Source :
Linguistic Survey of India(1903-1928) by George Abraham Grierson

Linguistic Survey of India(1903-1928) by George Abraham Grierson
Census Report for Assam, Manipur and Tripura, 1951
In the Census of 1951, an attempt was made to underreport Bengali numbers due to pressure from ethnonationalists. WHen Bengalis of Goalpara got wind of it, they insisted on reporting themselves as Goalparia instead. However, the then Assam government decided that everyone who reported Goalparia should be clubbed under Assamese. This inflated the Assamese count by more than 20 percentage points, and Assamese count shot up to 55% from around 30% in the 1931 census!
Another census is going to happen in 2026, and Bengalis from Undivided Goalpara, Barak Valley and every other region of Assam must be very careful about what is being written by the census officer/personnel who are visiting every household in Assam.
What goes in the census records decides the future of Bengalis in Assam.
The text classifies Sylheti as part of the broader Bengali language group, noting that the general sound changes characteristic of Bengali are easily visible in Sylheti. It highlights two main linguistic phenomena:
What it is: The text explains that Apinihiti occurs when the vowel sounds 'ই' (i) or 'উ' (u) are pronounced before they actually appear in a word, or when a vowel shifts its position (e.g., standard Chari becomes Chailb, or Satya becomes Soitto).
Sylheti Context: While Apinihiti is highly prominent in Sylheti, features like Abhishruti (vowel mutation) and vowel harmony are absent. Because of this, standard mutated words like 'রেখে' (rekhe), 'করেছে' (koreche), 'বিলিতি' (biliti), or 'দিশি' (dishi) do not form in this dialect.
গণ্য (Gonya) -----> গইন্য (Goinyo)
সন্ধ্যা (Shondhya) ------> সইন্ধা (Shoindhya)
মানুষের (Manusher) -------> মাইনসের (Mainsher)
**It also notes exceptions: words like ভক্ত (Bhokto) do not become ভইত্ত (Bhoitto), and ব্রাহ্মণ (Bramhon) does not become ব্রাইম্মণ (Braimmon).
The text states that except for the southeastern dialects of Noakhali and Chittagong, nasalized vowel sounds are generally absent in standard spoken Bengali variations.
This lack of nasalized vowels is also a key feature of the Sylheti dialect.
Examples provided:
কাঁটা (Kā̃ta - thorn) drops the nasal sound to become কাটা (Kata).
ফোঁটা (Phō̃ta - drop) drops the nasal sound and changes vowels to become ফুটা (Phuta).
Book - শ্রীহট্ট কাছাড়ের প্রাচীন ইতিহাস ও সংস্কৃতির রূপরেখা
Chapter - সিলেটি উপভাষা: ঐতিহাসিক ও ভাষাতাত্ত্বিক পবিপ্রেক্ষিত by জন্মজিৎ রায়
Read Further - https://www.reddit.com/r/BarakValleyCommunity/s/21VEF8xmr7
Images and references used are from the book The History of Bengal, Vol. 1 (ed. R. C. Majumdar).
Samatata or Harikela (Eastern Bengal) is one of the ancient regions of Bengal.
Historically, this region was ruled by Chandra Dynasty, a prominent ruling family of Bengal.
The Chandra rulers had set up an independent kingdom in Eastern Bengal during the second half of the tenth century A.D.
Harikela, as a core region, comprised present day Barak Valley, Sylhet Division (ancient Srihatta), Chittagong, as well as the Kailasahar–Dharmanagar area of Tripura.