context: Bulgaria is one of the countries with the lowest population growth rates in the world. [136] Negative population growth rates have occurred since the early 1990s, [137] due to economic collapse, low birth rates, and high emigration. In 1989 the population numbered 9,009,018 people, gradually decreasing to 7,950,000 in 2001 and being 7,528,000 in 2010. [138] Approximately 6,850,000 people (~ 87%) can speak Bulgarian as their native language, [139] which is part of South Slavic Language and is the only official language of this country.
question: What is the language of the majority of Bulgar tribes?
answers.text: Bulgarian