You didn't understand my question.
I know that translations are not an official part of JommSocial and that this is done by other users who help the JomSocial community.
I have already downloaded the package and there are all the files there but the files are completely empty. When you open any file they are empty.
I thought that somewhere in your file database there is a correct package with a Serbian translation.
Anyway, thank you for your reply I wish you a pleasant night/ day