History of Kulung
The kulung community has a separate language. The structure of their language had been categorized by linguists and language experts, in their study, under the Tebeto-Burmese language, like the languages of many other indigenous nationalities, as its main root. As the kulung language exists only in spoken form, it is phonetically and semantically represented by Devanagarih scripts. With the help of phonologist Dr. Madhav Pokhrel and linguist Mr. Amrit Yongen, the Kulung language experts had through discussion and, 21 consonants and 12 vowels were identified. While transcribing in kulung language, the system is to use only a long vowel symbol and a colon (:) with the long vowel symbol for a long sound. The kulung kirats call themselves as ‘Kulu Rodu’ in their language. ‘Kulung’ is in fact is a word in a changed form of ‘Kulu’ and is used/called by kulung non speakers

Kulung is a distinct community
According to the academician Dr. Harka Gurung 'the basis of a community is its mother tongue/language, and this has to be and this is what is the very self-identity'. This is an idea expressed in an interaction program organized by National Foundation for Development of Indigenous Nationalities (NFDIN) in connection with the budget of fiscal year 2060/61 in the social context of Dalit, Janajati and women. From this perspective, the language of the Kulung community spoken since thime immemorial is still in existence and, thus, this community can be considered as a separate caste.

As stated by Joseph Stalin in the context of Marxism and community a community means which is built upon the expression based in the form of a psychological expression in a common language, territory, economic life and culture, historically established and firm. The Kulung community is a permanent one residing in the Mahakulung area since the first time their ancestors had cultivated the area, being officiated to a common language, culture and economic activities and demonstrating psychological unity among themselves. This definition also justifies that the Kulungs are a separate community.