Limbu (Limbu: ᤕᤠᤰᤌᤢᤱ ᤐᤠᤴ, yakthuṅ pan) is a Sino-Tibetan language spoken by the Limbu people of Nepal and Northeastern India (particularly Darjeeling, Kalimpong, Sikkim, Assam and Nagaland) as well as expatriate communities in Bhutan. The Limbu refer to themselves as Yakthung and their language as Yakthungpan. Yakthungpan has four main dialects: Phedape, Chhathare, Tambarkhole and Panthare dialects.
Among four dialects , the Phedape dialect is widely spoken and well understood by most Yakthungpan speakers. However, as there are some dominant Panthare scholars who have role to create knowledge and control knowledge in the Limbu communities, Panthare dialect is being popularised as a "standard" Limbu language. As Panthare Yakthungs are much more engaged in central political position and administrative positions, they are trying to introduce Panthare dialect as a Standard Yakthungpan.
Yakthungpan (Limbu language) is one of the major languages spoken and written in Nepal, Darjeeling, Kalimpong, Sikkim, and Bhutan. Linguists have reached the conclusion that Yakthungpan resembles Tibetan and Lepcha.
Before the introduction of the Sirijanga script among Limbu Kirats, the Róng script was popular in east Nepal, especially in the early Maurong state. The Sirijanga script had almost disappeared for 800 years and it was brought back into use by Limbu scholar Te-ongsi Sirijunga Xin Thebe of Tellok Sinam Limbuwan present day Nepal. The Limbu script is called 'Sirijanga' after the Limbu culture- hero Te-ongsi Sirijunga Xin Thebe, who is credited with its invention.
Limbu is spoken east of the Arun River in the following districts of Nepal (Ethnologue).
Province No. 1
Dhankuta District
Ilam District
Jhapa District
Morang District
Panchthar District
Sankhuwasabha District
Sunsari District
Taplejung District
Terhathum District
The Language Commission of Nepal has recommended Limbu language as official language in Province No. 1. Chulachuli Rural Municipality, Mangsebung Rural Municipality and Phalgunanda Rural Municipality have recognized Limbu language as an official working language.