Cooch Behar district in the context of Jaldhaka River

Assamese or Asamiya (অসমীয়া [ɔˈxɔmija] ) is an Indo-Aryan language spoken mainly in the north-eastern Indian state of Assam, where it is an official language. It has long served as a lingua franca in parts of Northeast India. It has over 15 million native speakers and 8.3 million second language speakers according to Ethnologue.

Nefamese, an Assamese-based pidgin in Arunachal Pradesh, was used as a lingua franca before being replaced by Hindi; and Nagamese, an Assamese-based Creole language, continues to be widely used in Nagaland. The Kamtapuri language of Rangpur Division of Bangladesh and the Cooch Behar and Jalpaiguri districts of India is linguistically closer to Assamese, though the speakers identify with the Bengali culture and the literary language. In the past, it was the court language of the Ahom kingdom from the 17th century.

Mekhliganj (Bengali pronunciation: [mekʰliɡɔnd͡ʒ]), is a city and a municipality in Cooch Behar district in the Indian state of West Bengal. It is the headquarters of the Mekhliganj subdivision. Earlier it was a Zamindari divided mainly in 3 parts under the Cooch Behar Kingdom. Sikarwar Rajputs, the trading clan along with other local clans started the process of rehabilitation in Mekliganj. It is said that the elephant in the Royal Symbol of Koch Kingdom, was a gift from the Sikarwar Rajputs to the Koch King, Shri Shri Maharaja Shivendra Narayan, in return of fertile land near the Teesta River and 2 Rupees as nazrana. Later the Rajputs established Chattradhari Estate here. After the succession by Shri Shri Maharaja Narendra Narayan named this place to Mekhliganj, a place where 'Mekhla' (born as Simha) also (people from Narmada) people stays.

Lalmonirhat District (Bengali: লালমনিরহাট জেলা) is a District, situated at the northern border of Bangladesh. It is a part of the Rangpur Division. Lalmonirhat mahakuma was established as a district on 1 February 1984. To the north of Lalmonirhat lie Cooch Behar and Jalpaiguri districts of West Bengal; to the south lies Rangpur, to the east lie Kurigram and Cooch Behar; and to the west of lie Rangpur and Nilphamari District. The international border line of Lalmonirhat district is 281.6 km long.