Languages of India
Until the Twenty-first Amendment of the Constitution of India in 1967, the country recognised 14 official regional languages. The Eighth Schedule and the Seventy-First Amendment provided for the inclusion of Sindhi, Konkani, Meitei and Nepali, thereby increasing the number of official regional languages of India to 18. The Eighth Schedule of the Constitution of India, as of 1 December 2007, lists 22 languages, which are given in the table below together with the speaking population and the regions where they are used. 
The individual states, the borders of most of which are or were drawn on socio-linguistic lines, can legislate their own official languages, depending on their linguistic demographics. The official languages chosen reflect the predominant as well as politically significant languages spoken in that state. Certain states having a linguistically defined territory may have only the predominant language in that state as its official language, examples being Karnataka and Gujarat, which have Kannada and Gujarati as their sole official language respectively. Telangana, with a sizeable Urdu-speaking Muslim population, has two languages, Telugu and Urdu, as its official languages.
Bihari culture
Despite of the large number of speakers of Bihari languages, they have not been constitutionally recognized in India, except Maithili which is recognised under the Eighth Schedule of the Constitution of India. Hindi is the language used for educational and official matters in Bihar. These languages was legally absorbed under the subordinate label of Hindi in the 1961 Census. Such state and national politics are creating conditions for language endangerment.
The first success for spreading Hindi occurred in Bihar in 1881, when Hindi displaced Urdu as the sole official language of the province. In this struggle between competing Hindi and Urdu, the potential claims of the three large mother tongues in the region – Bhojpuri, Maithili and Magahi were ignored. After independence Hindi was again given the sole official status through the Bihar Official Language Act, 1950. Urdu became the second official language in the undivided State of Bihar on 16 August 1989. Bihar also produced several eminent Urdu writers including Sulaiman Nadvi, Manazir Ahsan Gilani, Abdul Qavi Desnavi, Paigham Afaqui, Jabir Husain, Sohail Azimabadi, Hussain Ul Haque, Dr. Shamim Hashimi, Wahab Ashrafi etc.