 The institution heads academic linguistic research in Turkey into the Turkish language and its sister Turkic languages of Central Asia.It publishes "Türkçe Sözlük", the official Turkish dictionary, and "Yazım Kılavuzu", the Turkish writing guide, in addition to many other specialized dictionaries, linguistics books and several periodicals.During the 1930s, the Turkish Language Association led campaigns to replace the Arabic, Persian and Greek loanwords in the Turkish language.