What is the official language of Slovenia?

Slovenian is the official language of the Republic of Slovenia. At the same time, it is the mother tongue of around 2.4 million people, of whom around 1.85 million live in Slovenia. Slovenian is an inherently coherent language with social and structural integrity and is open to evolving further. We wish it to remain so, and therefore ensure that Slovenian is used and continuously evolving in all areas of public life in the country as well as abroad.

Source: Republic of Slovenia