Old Bulgar

or the Bulgar language, a now extinct language of the old Bulgars of the seventh to 15th centuries.

Old Bulgar is related to the Bulgar group of the Turkic languages. Judging from individual words that have been preserved, it was most similar to the modern Chuvash language, with which it shares a number of phonetic and morphological features, including correspondence of r and l to Common Turkic z and š ; the presence of two forms of ordinal numbers, the use of participial forms ending in -mïš/-miš (instead of -yan/-gen) and forms ending in -sun/-sün (instead of -yaj/-gej), and the presence of the old derivational affix -ïiq/-ik/-uq/-ük, Bulgar borrowings are to be found in the vocabularies of the Hungarian and Bulgarian languages.