SLAV is a four-letter crossword solution for the term Slovenian. Slovenian is a South Slavic language spoken by approximately 2.5 million people, primarily in Slovenia. It is also spoken in parts of Austria, Hungary, Croatia, and Italy. Slovenian is closely related to other South Slavic languages such as Croatian, Bosnian, and Serbian. It is the official language of Slovenia and one of the 24 official languages of the European Union.