Още нещо интересно от статията за езика на гагаузите, от което може да се съди и какъв е бил езика на прабългарите, а именно тюркски.

The Gagauzes from Kongaz speak a central (or ‘‘Bulgar’’) dialect, whereas the Gagauzes from Etulia speak a southern (or maritime) dialect.
As ethnologists and linguists maintain, the ethnic differentiation of the Gagauzes had happened on the Balkan Peninsula long before their migration to Bessarabia in the beginning of 19th century.
The ‘‘Bulgar’’ Gagauzes were in the domain of the Bulgarian Orthodox Church, and thus subjectedto a strong cultural influence by Bulgarians. The finding that the Kongaz Gagauzes are very close genetically to Bulgarians may be explained, in part, by a culturally enforced mixing between the Bulgarians and ‘‘Bulgar’’ Gagauzes. Alternatively, the Turkic language could be imposed on a group of Bulgarians through the elite-dominance process. The maritime Gagauzes were in the domain of the Greek Orthodox Church and, thus, socially isolated from the Bulgarians because of hostile relations between the two Orthodox Churches on the Balkan Peninsula.
The significant distance between the Gagauzes from Etulia, on the one hand, and the Gagauzes from Kongaz and the Bulgarians, on the other hand, implies a limited
gene flow between these groups. Alternatively, the differences between the Gagauz groups (either cultural or genetic) may have existed prior to the penetration of the Turkic language into the Balkans. According to this hypothesis,
the Turkic language could have been imposed on culturally and genetically diverse groups in the Balkans.