"Български" refers to the Bulgarian language, which is a South Slavic language spoken primarily in Bulgaria. It is the official language of the country and is written in the Cyrillic script. Bulgarian is known for its rich vocabulary and complex grammar, which includes definite articles and a system of verb aspects. The language has a long history, with roots tracing back to the Old Bulgarian language used in the 9th century. Bulgarian is also significant for its cultural heritage, as it is the language of many famous literary works and historical documents, contributing to the identity of the Bulgarian people.