Delhi is officially known as the National Capital Territory of Delhi (NCT) that includes the Indian capital New Delhi, and its the second most populous metropolis in India. Hinduism is Delhi's most popular religion, with approximately 82% of Delhi's population. The city has large communities of Muslims (11.7%), Sikhs (4%), Baha'i (0.1%), Jains (1.1%) and Christians (0.94%) in the city. Other minority religions include Buddhism, Zoroastrianism and Judaism. The principle language in Delhi is Hindustani, and Hindi (Devanagari Script) is the principal written language of the city. There is a sizable Punjabi population and the Punjabi language has second language status in Delhi.