Serbian spoken, English subtitles.
Balkan Spy is a 1984 Yugoslav comedy drama film directed by Serbian directors Dušan Kovačević and Božidar Nikolić.
Convinced that his subtenant is a spy and an enemy of the state, Ilija Čvorović (Bata Stojković), a former Stalinist who spent several years in a prison, falls into deep paranoia which leads to absurd and destructive chain of events.
https://www.imdb.com/title/tt0086935/