Abstract:- The Muslim rule in India from the 8th to the 18th centuries had a profound impact on the development of regional languages and literatures in the subcontinent. The introduction of Persian and Arabic vocabulary, script, and literary forms enriched the existing Indic vernaculars and gave rise to new languages such as Urdu and Deccani. The Muslim rulers also patronized various forms of literature, such as poetry, history, biography, and mysticism, in both Persian and the local languages. The cultural and religious interactions between Islam and Hinduism, as well as other faiths, fostered the growth of Sufi and Bhakti movements, which expressed their spiritual and social messages through vernacular poetry and music. The Muslim influence on the Indian languages and literatures was not uniform, but varied according to the regional, historical, and political contexts. Keywords: Muslim rule, India, regional languages, literatures, Persian, Arabic, Urdu, Deccani, Sufism, Bhakti, poetry, music.