Languages of the Ottoman Empire
The Ottomans had three influential languages: Turkish, spoken by the majority of the people in Anatolia and by the majority of Muslims of the Balkans except in Albania, Bosnia, and various Aegean Sea islands; Persian, initially used by the educated in northern portions of the Ottoman Empire before being displaced by Ottoman Turkish; and Arabic, used in southern portions of the Ottoman Empire; Arabic was spoken mainly in Arabia, North Africa, Mesopotamia and the Levant. Throughout the vast Ottoman bureaucracy Ottoman Turkish language was the official language, a version of Turkish, albeit with a vast mixture of both Arabic and Persian grammar and vocabulary.
Ottoman poetry
Even in modern Turkey, however, Ottoman Divan poetry is a highly specialist subject. Much of this has to do with the fact that Divan poetry is written in Ottoman Turkish, which was written using a variant of the Arabic script and made extensive use of Arabic and Persian words, making the language vastly different from modern Turkish. In its own time, knowledge of this form of literary Turkish was largely limited to the educated classes.