A state prosecutor’s office shall conduct its work in the Slovene language.

In areas indigenously populated by the Italian or the Hungarian ethnic community, the state prosecutor’s office shall also conduct its work in the Italian or the Hungarian language respectively, if proceedings before a court or before another state body are conducted in the respective language or if a party living in such area uses that language in dealings with the state prosecutor’s office.

Source: Report submitted by the Republic of Slovenia pursuant to Art. 25 Para. 1 of the Framework Convention for the Protection of National Minorities
http://www.humanrights.coe.int/minorities/Eng/FrameworkConvention/StateReports/2000/slovenia/slovenia.html#annex2