These volumes comprise and introduction to the Bulgarian langauge. No previous knowledge of Bulgarian or any other Slavic language is assumed. Each Unit kof theis course asside from review units is divided into three parts Basic Sentences Notes Drills The notes explain the grammatical structure of the language.
I am Bulgarian and downloaded the Bulgarian Basic Course to get a better idea of the series... And was appalled!
Just to start with the very first word in the course - Dobrutro! (Good morning) This is an archaic form used during the 19th and early 20th century and nowadays can be heard very rarely, usually jokingly. The correct form is Dobro utro - ONLY!
The reading is very fast and with noticeable dialect. Every now and then a word or phrase is in an archaic, dialect or simply incorrect form.
Another example is the expression "po Bulgarski" (in Bulgarian). The correct form is "na Bulgarski" and the preposition "po" in this case can be heard either as archaic, dialect or borrowed from Russian.