Limbu language
Limbu (Limbu: , "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 and/or many 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. Geographical distribution. Limbu is spoken east of the Arun River in the following districts of Nepal ("Ethnologue"). Official status. Nepal. 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. India. In India, the state  of Sikkim has recognized Limbu language as an additional official language for the purpose of preservation of culture and tradition in the state. The official weekly publication "Sikkim Herald" has a Limbu Edition. Dialects. The Limbu languages are divided into four dialects : "Ethnologue" lists the following dialects of Limbu. Yanggrokke, Chaubise, and Charkhole are minor variants of the Panthare dialect. Phedappe and Tamorkhole are similar. Chattare is less well understood by other dialect speakers. The Limbu dialect spoken in Sikkim, India is the same as Panthare. Phonology. Vowels and consonants. /, / can be heard as rounded [, ] after labial consonants. Sirijanga script . Limbu language is one of the few Sino-Tibetan languages of the central Himalayas with their own scripts. The Limbu script or Sirijanga script was devised during the period of Buddhist expansion in Sikkim in the early 18th century when Limbuwan still constituted part of Sikkimese territory. The Limbu script was probably designed roughly at the same time as the Lepcha script (during the reign of the third King of Sikkim, Phyag-dor Nam-gyal (ca. 1700-1717)). However, it is widely believed that the Limbu script (Sirijanga) had been designed by the Limbu King Sirijanga Hang in the 9th  century. The Sirijanga script was later redesigned and re-introduced by Te-ongsi Sirijunga Xin Thebe . As Te-ongsi Sirijunga Xin Thebe spent most of his time in the development of Yakthungpan, Yatkhung culture, and Limbu script; he is considered as the reincarnation of the 9th century King Sirijanga. As Te-ongsi Sirijunga Xin Thebe was astoundingly influential in spreading the Limbu script, culture, and language, Tasang monks came to fear that he might transform the social, cultural, and linguistic structure of Sikkim. Therefore, Tasang monks captured Sirijunga, bound him to a tree, and shot him to death with poisonous  arrows. Both Limbu and Lepcha were ostensibly devised with the intent of furthering the spread of Buddhism. However, Sirijanga was a Limbu Buddhist who had studied under Sikkimese high Lamas. Sirijanga was given the title 'the Dorje Lama of Yangrup'. The language and script's influential structure are mixture of Tibetan and Devanagari. Unlike most other Brahmic scripts, it does not have separate independent vowel characters, instead using a vowel carrier letter with the appropriate dependent vowel attached. The Limbu language and literature have been less practiced in Nepal since the last eighteenth century. The cultural identity of any community  was taken as a threat to the national unification by ruling elites until the recent years. The use of the Limbu alphabet was banned and the possession of Limbu writings outlawed. There were no specific laws about it, but the Security Act was enforced for such cases under the strong directives of Kathmandu. Writing. Limbu has its own unique writing system, which is similar to Tibetan and Sikkimese scripts. The Limbu script or Sirijunga script is unique and scientifically designed by King Sirijanga in the 9th century; it was later re-designed and popularized by Te-ongsi Sirijunga Xin Thebe  and his followers in the 18th century. Since teaching of Limbu/Yakthung language and writing was banned by the Khas-Hindus in Nepal after the "Noon Pani Sandhi" between the Limbuwan and Gorkha Kingdom (Prithvi Narayan Shah), far more Limbus are literate in Nepali than in Limbu in Nepal. Although many Limbu books were written in Devanagari and Roman (English), now Limbus/Yakthungs have well developed computerized writing system and many books are published in Limbu script or Sirijunga script. History of Kirat-Yakthung writing can be divided into the following ways: Publications. The Limbu language has many papers and  publications in circulation. Tanchoppa (Morning Star), a monthly newspaper/magazine which has been published since 1995. There are many other literary publications. The oldest known Limbu writings were collected from the Darjeeling district in the 1850s. They are the ancestors of the modern Limbu script. The writings are now a part of a collection in the India Library in London. Teaching. In Nepal, the Limbu language is taught on private initiative. The Government of Nepal has published "Ani Paan" text books in Limbu for primary education from grades 1 to 12. Kirant Yakthung Chumlung teaches Limbu language and script on  its own initiative. In Sikkim, since the late 1970s, Limbu in the Limbu script has been offered in English-medium schools as a vernacular language subject in areas populated by Limbus. Over 4000 students study Limbu for one hour daily taught by some 300 teachers. Course books are available in Limbu from grades 1 to 12. Additionally, the significance of Limbu in Sikkim is that the name of the Indian state itself is a combination of two Limbu words: "su", which means "new", and "khyim", which means "palace" or "house".