The idea that the Bulgars were Turkic-speaking people comes not from a real examination of records and the empirical lexical material in some of the stone inscriptions but from the interpretation of words in the "Name List of Bulgarian Khans". It is also clear that a part of military titles as "chorguboil", "yabgu" (syubighi, Yuvigi) is also Turkic. But to form a definitive theory about the historic turkic-speach of the Bulgarians, it is necessary to take into account the records, including Arab and medieval historical sources, which very clearly and categorically stated that the Bulgarian and Khazarian languages ​​are similar, but differ from Turkic.