Ottoman Turkish is currently unavailable. Nevertheless, it is possible to find traces of the words remaining from Ottoman Turkish in modern Turkish. The wealth of modern Turkish comes from here.  Ottoman Turkish is a difficult language, but it has incredible potential because it sheds light on history. It is not an actively spoken language and it is much, much harder to learn than modern Turkish. There are people from all over the world who come to Turkey to do a PhD in this language. Luckily one of them is my best friend.