Albanians can be culturally and linguistically separated into two groups such as the northern Ghegs and southern Tosks. The line of demarcation between both groups, based on dialect, is the Shkumbin River that crosses Albania from east to west. Outside of Albania, Gheg is mostly spoken by the Albanians of Kosovo, northwestern North Macedonia, Montenegro and Croatia (Arbanasi). On the other hand, Tosk is spoken by the Albanians of Greece (Arvanites, Chams), southwestern North Macedonia and southern Italy (Arbëreshë). The diversity between Ghegs and Tosks can be substantial, both sides identify strongly with the common national and ethnic culture.