Looks like an Arab Saif with a Hungarian ”trophy” blade to me. These links may be of interest:
It’s not impossible that the sword could have been used in the Balkans.
Not sure what the lion passant symbol is doing there as typically the Habsburg eagle was used on these blades. A lion is a heraldic symbol of the Kingdom of Bohemia, but was also the symbol of Sultan Baybars founder of the Mamluk state. I can’t see any details in the pictures of the blade.