Bulgarian dialects (Bulgarian: български диалекти, balgarski dialekti, also български говори, balgarski govori or български наречия, balgarski narechiya) are the regional spoken varieties of the Bulgarian language, a South Slavic language. Bulgarian dialectology dates to the 1830s and the pioneering work of Neofit Rilski, Bolgarska gramatika (published 1835 in Kragujevac, Serbia, then Ottoman Empire).