Orbini also published a book in Serbo-Croatian, "Spiritual Mirror" (, 1595), which was essentially a translation of the Italian work by Angelo Nelli. This text, translated into the "Ragusan language", as Orbin called the local Slavic vernacular, has cultural and historical importance as an example of prose of the 16th century. His work was one of few primary sources about the 1385 Battle of Savra, although it contains many incorrect and imprecise data about this battle.