The Razlog dialect is a Bulgarian dialect, member of the Rup dialects. Its range includes the valley of Razlog in southwestern Bulgaria and its immediate neighbours are the Rup Serres-Nevrokop dialect to the south, the Babyak dialect to the east, the Samokov and Ihtiman dialects to the north and the Blagoevgrad-Petrich dialect to the west. It shares a number of phonological characteristics with both the Rup (especially the Rhodopean) and the Southwestern dialects. This is the dialect through which the Bulgarian language became known to modern science, because in 1822 the creator of the modern Serbian language Vuk Karadžić published in Vienna Dodatak k sankpeterburgskim sravnitelnim rijechnicima sviju jezika i narijechija s osobitom ogledom Bugarskog jezika ;("An addition to the St. Petersburg comparative dictionaries of all languages and dialects with a particular sample of the Bulgarian language"), in which are placed 273 words, a short grammar, 27 folk songs and 2 chapters of the gospel, which he wrote and said to him pravi bugarin iz Razloga;("a real Bulgarian from Razlog").[1]