About Hyderabad
The residents of Hyderabad, referred to as "Hyderabadi", are Urdu-speaking, followed by Telugu people people and a minority of Tamil, Marathi, Kannada (including Nawayathi), Marwari, Bengali, Malayali, Gujarati, Punjabi and Uttar Pradeshi communities. Among the communities of foreign origin, Yemeni Arabs form the majority, although African Arabs, Armenians, Abyssinians, Iranians, Pathans and Turkish people are also present. The foreign population declined after Hyderabad State became part of the Indian Union, as it lost the patronage of the Nizams.

Telugu is the official language of Hyderabad and Urdu is its second language. The Telugu dialect spoken in Hyderabad is called Telangana, and the Urdu spoken is called Dakhani. :1869–70 English is also used, particularly among white-collar workers. A significant minority speaks other languages, including Hindi, Marathi, Tamil, Bengali and Kannada.[80]

Hindus form the majority of Hyderabad's population. Muslims are present throughout the city and predominate in and around the Old City. There are also Christian, Sikh, Jain, Buddhist and Parsi communities, and iconic temples, mosques and churches can be seen. According to the 2001 census, Hyderabad district's religious make-up was: Hindus (55.41%), Muslims (41.17%), Christians (2.43%), Jains (0.43%), Sikhs (0.29%) and Buddhists (0.02%); 0.23% did not state any religion.
Source: https://en.wikipedia.org/wiki/Hyderabad,_India