abstract:Istro-Romanian is an Eastern Romance language spoken today in a few villages and hamlets in the peninsula of Istria, on the northern part of the Adriatic Sea, in what is now Croatia as well as in other countries around the world where the Istro-Romanian people settled after the two world wars, most notably in Italy, the United States, Canada, Argentina, Australia, Sweden, Germany, and other countries. Before the 20th century, it was spoken in a substantially broader part of northeastern Istria surrounding the Ćićarija mountain range (ancient Mons Carusadius) all the way up to Trieste.