According to Wikipedia 34 languages are spoken there,for a complete list you can go to Wikipedia.
For the languages of Poland, click here.For the languages of Serbia, click here.For the languages of Bulgaria, click here.
Bulgaria's official language is Bulgarian, but minority languages like Turkish, Romani, and others are also spoken. These languages reflect the diverse cultural heritage of Bulgaria, with influences from different ethnic groups and historical periods. The variety of languages spoken in Bulgaria contributes to the country's cultural richness and diversity.
Ruse, Bulgaria: about 150,000
Bulgarian, Armenian
No
The official language of Sofia, Bulgaria is Bulgarian. English is widely spoken, especially in tourist areas and among younger generations. Additionally, some people may also speak Russian, Turkish, or other Balkan languages.
Sofia, Plovdiv, Burgas, Varna, Ruse
about 350 kilometers. It takes 6 hours by bus and 8 hours by train
Mimi Balkanska was born in 1902, in Ruse, Bulgaria.
Zahari Zhandov was born on October 1, 1911, in Ruse, Bulgaria.
Atanas Tzenev was born on September 1, 1933, in Ruse, Bulgaria.
Maria Valentinova was born on October 22, 1979, in Ruse, Bulgaria.