The official language of Sikkim is:

The official language of Sikkim is Nepali. It is the language of the majority of the population of Sikkim. It is also the language of government and education in Sikkim.

Bhutia is a Tibeto-Burman language spoken by the Bhutia people of Sikkim and Bhutan. It is the second most spoken language in Sikkim.

Lepcha is a Tibeto-Burman language spoken by the Lepcha people of Sikkim and West Bengal. It is the third most spoken language in Sikkim.

English is a widely spoken second language in Sikkim. It is used in government, education, and business.