Hindi (Devanagari: , IAST/ISO 15919: "Hindī"), or more precisely Modern Standard Hindi (Devanagari: मानक हिन्दी, IAST/ISO 15919: "Mānak Hindī"), is an Indo-Aryan language spoken in India. Hindi has been described as a standardised and Sanskritised register of the Hindustani language, which itself is based primarily on the Khariboli dialect of Delhi and neighbouring areas of Northern India. Hindi, written in the Devanagari script, is one of the two official languages of the Government of India, along with the English language. It is an official language in 9 States and 3 Union Territories and an additional official language in 3 other States. Hindi is also one of the 22 scheduled languages of the Republic of India.