Southwestern Istrian (Croatian: Jugozapadni istarski dijalekt), also known as Chakavian-Shtokavian, Shtokavian-Chakavian, or Shtakavian-Chakavian ikavian (Croatian: čakavsko-štokavski/štokavsko-čakavski/štakavsko-čakavski ikavski dijalekt), is one of the dialects of the Chakavian language in Istria, Croatia. Through the history there were different hypothesis which classified it, besides in Chakavian, instead in Shtokavian, because it is a transitional dialect. It is the most widespread Chakavian dialect in Istria.