List of lingua francas
Turkish is still in use and widely spoken in several areas formerly part of the Ottoman Empire and may be understood by older people in other parts of the Middle East.
Rise of the Ottoman Empire
When the Ottoman polity first emerged at the end of the thirteenth century under the leadership of Osman I, it had a tribal organization without a complex administrative apparatus. As Ottoman territory expanded its rulers were faced with the challenge of administering an ever-larger population. Early on the Ottomans adopted the Seljuks of Rum as models, and by 1324 were able to produce Persian-language bureaucratic documents in the Seljuk style.