Following the Turko-Afghan conquest of Bengal in the early thirteenth century, nearly seven centuries of cultural assimilation profoundly shaped the Bengali language and literature under the influence of the ruling class’s Persianate traditions. Muslim writers composed original works in Bengali and adapted Islamic themes, introducing numerous Persian and Arabic words into the vernacular while retaining existing literary forms. They modified conventions such as replacing Hindu invocations in Mangalkavya with hamd and na‘t, following Iranian epic traditions. This influence is evident in dobhasi literature, romantic narratives (e.g., Alaol’s translations and adaptations of Nizami and Jami, Bahram Khan’s Laila Majnu, works on Yusuf-Zulekha and Amir Hamza), historical and religious epics (Syed Sultan’s Nabi Bangsha, poems on Karbala and the prophets by Heyat Mahmud and others), and mystic literature shaped by Sufism (philosophical expositions, murshidi and Baul songs). Persian also contributed themes, forms such as the ghazal, metres, imagery, and a lasting religious-cultural vocabulary (roza, namaz, khuda, etc.). Overall, Persian-Bengali interaction produced a deep linguistic, literary, and cultural synthesis that enriched Bengali literature and the identity of Bengali-speaking Muslims.