Chakavian
Chakavian or Čakavian , , ( , proper name: "čakavica" or "čakavština" , own name: "čokovski, čakavski, čekavski") is a dialect of the Serbo-Croatian language spoken by a minority of Croats. It has a low mutual intelligibility with Shtokavian. There is much internal diversity, to the point where intelligibility between the northern and southern varieties of Chakavian is low. All three main Serbo-Croatian dialects are named after their most common word for "what?", which in Čakavian is "ča" or "ca". Chakavian is spoken mainly in the northeastern Adriatic: in Istria, Kvarner Gulf, in most Adriatic islands, and in the interior valley of Gacka, more sporadically in the Dalmatian littoral and central Croatia.
Bosnian language
Bosnian is based on the most widespread dialect of Serbo-Croatian, Shtokavian, more specifically on Eastern Herzegovinian, which is also the basis of Standard Croatian, Serbian, and Montenegrin. Until the dissolution of SFR Yugoslavia, they were treated as a unitary Serbo-Croatian language, and that term is still used in English to subsume the common base (vocabulary, grammar and syntax) of what are today officially four national standards, although this term is controversial for native speakers, and paraphrases such as "Serbo-Croato-Bosnian" (SCB) or "Bosnian-Croatian-Serbian" (BCS) are therefore sometimes used instead, especially in diplomatic circles.