The official name of the office, literally translated, is "President of the Government" (Predsjednik Vlade), rather than "Prime Minister" (Prvi Ministar).
Το επίσημο όνομα του αξιώματος, κυριολεκτικά μεταφράζεται, "ο Πρόεδρος της Κυβέρνησης" (Predsjednik Vlade), αντί "Πρωθυπουργός" (Prvi Ministar).