Czech is one of the West Slavic languages, along with Slovak, Polish, Pomeranian (Kashubian), and Lusatian Sorbian. It is spoken by most people in the Czech Republic and by Czechs all over the world (about 12 million native speakers in total). Czech is very close to Slovak and, to a lesser degree, to Polish. Most adult Czechs and Slovaks are able to understand each other without difficulty as they were routinely exposed to both languages on the national TV and radio until the splitting of Czechoslovakia. People born after circa 1985 may have difficulty grasping the few words that differ significantly, or understanding fast spoken language.