Languages of the Ottoman Empire
The language of the court and government of the Ottoman Empire was Ottoman Turkish, but many other languages were in contemporary use in parts of the empire. Although the minorities of the Ottoman Empire were free to use their language amongst themselves, if they needed to communicate with the government they had to use Ottoman Turkish.
Persian language
The language spread geographically from the 11th century on and was the medium through which among others, Central Asian Turks became familiar with Islam and urban culture. New Persian was widely used as a trans-regional lingua franca, a task for which it was particularly suitable due to its relatively simple morphological structure and this situation persisted until at least 19th century. In the late Middle Ages, new Islamic literary languages were created on the Persian model: Ottoman Turkish, Chagatai and Urdu, which are regarded as "structural daughter languages" of Persian.