Explanation:

Part 17 of the constitution of India (Articles 343 to Article 351) makes elaborate provisions dealing with the official language of the Republic of India. The main provisions dealing with the official language of the Union are embodied in Articles 343 and 344 of the Constitution of India. The Official languages have been listed in the 8th schedule of Constitution of India.

Hindi written in Devanagari script is the Official Language of the Union. The original constitution provided that for a period of 15 years from the commencement of the constitution, English will continue to be used for all official purposes of the Union. The constitution made it clear that President may, during the said period, by order authorize the use of the Hindi language in addition to the English language and of the Devanagari form of numerals in addition to the international form of Indian numerals for any of the official purposes of the Union.

Though Hindi is the official language of India, the states may by law adopt any one or more of the languages in use in the state or Hindi as the language or languages to be used for all or any of the official purposes of that state.

According to the Article 348, language to be used in the Supreme Court and in high courts and for bills acts etc will be in in the English language until parliament by law provides otherwise. However state governments may allow High Courts to make use of State Official Language but the judgments, decrees etc. must be made available in English as well