Hindustani Persian

The Persian language historically influenced many of the modern languages and dialects of Eastern Europe, Middle East, Central Asia, and South Asia, including a standard register of the Hindustani language, Urdu, the national language of Pakistan and an official language in eight states in India.

Following the Turko-Persian Ghaznavid conquest of South Asia, the speech based in Delhi's Khariboli dialect and other dialects of South Asia received a large influx of Persian, Chagatai and Arabic vocabulary. The subsequent Turko-Afghan Delhi Sultanate gave way for a further continuation of this. The basis in general for the introduction of Persian language into the subcontinent was set, from its earliest days, by various Persianized Central Asian Turkic and Afghan dynasties.

This lexically hybrid language, Hindustani, emerged in the northern subcontinent, was commonly called Zaban-e Urdu-e Mualla ('language of the exalted city') and eventually replaced Persian, the court language, and its name was shortened to just "Urdu". It grew from the interaction of Persian and Turkic-speaking Muslim soldiers and the native peoples. Under Persian influence from the state, the Persian and Nastaʿlīq scripts were adopted, with additional figures added to accommodate the Indo-Aryan phonetic system.

...
Wikipedia