About Bulgarian transcription
Bulgarian (Български) is written in Cyrillic and spoken principally in Bulgaria. Subtitles generated here come back in that script, as ordinary written Bulgarian, ready to use in an SRT or VTT file.
Bulgarian is unusual among Slavic languages in having dropped noun cases and in attaching its definite article to the end of the word rather than placing it before. It is also close to Macedonian, close enough that detection between the two is not dependable.

