India the native language was Khariboli, whose earliest form is known as Old Hindi (or Hindavi). It belongs to the Western Hindi group of the Central Indo-Aryan languages. The contact of Hindu and Muslim cultures during the period of Islamic conquests in the Indian subcontinent (12th to 16th centuries) led to the development of Hindustani as a product of a composite Ganga-Jamuni tehzeeb. In cities such as Delhi, the Indian language Old Hindi began to acquire many Persian loanwords and continued to be called "Hindi" and later, also "Hindustani". An early literary tradition of Hindavi was founded by Amir Khusrau in the late 13th century. After the conquest of the Deccan, and a subsequent immigration of noble Muslim families into the south, a form of the language flourished in medieval India as a vehicle of poetry, (especially under the Bahmanids), and is known as Dakhini, which contains loanwords from Telugu and Marathi. From the 13th century until the end of the 18th century the language now known as Urdu was called Hindi, Hindavi, Hindustani, Dehlavi, Dihlawi, Lahori, and Lashkari. The Delhi Sultanate established Persian as its official language in India, a policy continued by the Mughal Empire, which extended over most of northern South Asia from the 16th to 18th centuries and cemented Persian influence on Hindustani. According to the Navadirul Alfaz by Khan-i Arzu, the "Zaban-e Urdu-e Shahi" [language of the Imperial Camp] had attained special importance in the time of Alamgir". By the end of the reign of Aurangzeb in the early 1700s, the common language around Delhi began to be referred to as Zaban-e-Urdu, a name derived from the Turkic word ordu (army) or orda and is said to have arisen as the "language of the camp", or "Zaban-i-Ordu" means "Language of High camps" or natively "Lashkari Zaban" means "Language of Army". It is recorded that Aurangzeb spoke in Hindvi, which was most likely Persianized, as there are substantial evidence that Hindvi was written in the Persian script in this period. During this time period Urdu was referred to as "Moors", which simply meant Muslim, by European writers. John Ovington wrote in 1689: The language of the Moors is different from that of the ancient original inhabitants of India but is oblig'd to these Gentiles for its characters. For though the Moors dialect is peculiar to themselves, yet it is destitute of Letters to express it; and