Common typological features are an agglutinative suffixing word structure, sound harmony, verb-final word order, and the use of numerous nonfinite verb constructions.Korean and Japanese are often considered as a part of Altaic family, but it is still on discussing.  sign language alphabet  This linguistic discussion is now becoming a theory. Linguists have worked for a long period of time to determine the answer of the Altaic Theory but have not yet unraveled the question.Korean is considered to be an isolated language. Turkish proper (i.e., the Turkish language spoken in Turkey) belongs to the Turkic languages. Both languages use vowel harmony. Both languages are agglutinative (i.e., they use suffixes)