Like Serbo-Croatian, Macedonian, and Bulgarian, Slovene is a language of the southern Slavic group. It is closest to Serbo-Croatian, but the two are not mutually intelligible. Slovene is written in the Roman alphabet and has the special letters c, š, and z. The letters q, w, x, and y are missing. As of 2002, 91% of the populace spoke Slovene; 6% spoke Serbo-Croatian; and 3% used various other languages.