The Babyak dialect is a Bulgarian dialect, member of the Rup or Southeastern Bulgarian dialects. It is spoken in several mountainous villages on the western fringes of the Rhodopes and is thus sandwiched between the Chepino dialect on the east and northeast and the Razlog dialect to the south and west. It shares a number of phonological characteristics with both the Rup (especially the Rhodopean) and the Southwestern dialects. Because of its specific reflexes of Old Church Slavonic yat, it is generally classified as a Rup dialect but is actually transitional between the two dialectal groups.