Bolgar Language - Danube Bulgar

The language of the Danube Bulgars (or Danube Bulgar) is recorded in a small number of inscriptions, which are found in Pliska, the first capital of Danube Bulgaria and in the rock churches near the village of Murfatlar, present-day Romania. Some of these inscriptions are written with Greek characters, others with runes similar to the Orkhon script. Most of them appear to have a private character (oaths, dedications, inscriptions on grave stones) and some were court inventories. Although attempts at decipherment have been made, none of them has gained wide acceptance. These inscriptions in Danube-Bulgar are found along with other official ones written in Greek. Greek was used as the official state language of Danube Bulgaria until the 9th century, when it was replaced by Old Bulgarian (Slavonic).

The language of the Danube Bulgars is also known from a small number of loanwords in the Old Bulgarian language, as well as terms occurring in Bulgar Greek-language inscriptions, contemporary Byzantine texts, and later Slavonic Old Bulgarian texts. Most of these words designate titles and other concepts concerning the affairs of state, including the official 12-year cyclic calendar (as used e.g. in the Nominalia of the Bulgarian Khans). The language became extinct in Danubian Bulgaria in the 9th century as the Bulgar nobility became gradually Slavicized after the Old Bulgarian was declared as official in 893.