Chakavian
Chakavian in its actual use is the least spoken Serbo-Croatian dialect, being spoken only by 12% Croats. It is now mostly reduced in southwestern Croatia along the eastern Adriatic: Adriatic islands, and sporadically in the mainland coast, with rare inland enclaves up to central Croatia, and minor enclaves in Austria and Montenegro. All areas of old contacts with Romance languages.
Vlachs in the history of Croatia
According to Stjepan Pavičić (1931), the Romance Vlachs or Morlachs of the Dinara and Velebit lost their Romance language by the 14th or 15th century, or were at least bilingual at that time. The so-called Istro-Romanians, called by themselves "Rumeri" or "Vlasi", continued to speak their language on the island of Krk (extinct in the 20th century; recorded Pater Noster) and villages around the Čepić lake in Istria, while other communities in the mountains (Ćićarija) above the lake preserved the Shtokavian-Chakavian dialect with Ikavian accent from the southern Velebit and area of Zadar. The documents about Vlachs from Cetina county indicate Chakavian dialect with Ikavian accent.