Professor Ph.D. Mary Lakova graduated in Bulgarian Philology at Sofia University "St. Kliment Ohridski ”. She worked at the Institute of Bulgarian Language. She is the author of several books, including "The Principle of Constructivism in the Grammatical Semantics of the Bulgarian Sentence", "On Some Regularities in Language and Speech", "Questions and Interrogative Sentences in the Bulgarian and Polish Languages", "On the Proto-Bulgarians and Their Language". “, Etc., as well as numerous studies, articles, language notes on issues of Bulgarian grammar, vocabulary, language culture.