Persian became the court language of the Delhi Sultanate because the ruling elites, administrators, and scholars were trained in Persian traditions. This language brought with it a rich literary and cultural heritage from Iran and Central Asia. Persian was used in royal decrees, legal documents, historical chronicles, and poetry. As Persian interacted with local Indian languages, especially Hindi and Prakrit dialects, it helped create early forms of Urdu. Many famous works, such as Tabaqat-i-Nasiri and Tarikh-i-Firozshahi, were written in Persian. The language also influenced architecture, music, clothing, and etiquette, shaping Indo-Persian culture that continued even after the Sultanate.