The Hungarian language has had three major linguistic relations with various Turkic languages in various periods. The most important of these is the one that started in the 5th and 6th centuries between Hungarian and Bulgarian/Chuvashtype Turkic languages. This topic is one of the most significant fields of study in Hungarian Turkology. The second relationship developed between Hungarian and Kipchak-type Turkic languages following the Mongolian invasion. The study titled West Old Turkic published in 2011 provides the criteria for the differentiation between borrowed words belonging to both periods. The borrowed words during the priod of the third relationship - this time between Hungarian and Ottoman - have also been identified in a study published within the field of Hungarian Turkology.