Please note the language of this forum is English.
So your posts should also always be in English or with an English translation.
However, I understand you did as suggested in the help.txt file and that you could now also read it (yes it is the same).
Further also the Servian language file which is in the actual 2.32.975 download version of BSPlayer still is the one for version 2.30.970.
(Only few changes between those versions anyhow.)
I'm not sure that your problem has gone now, because I think you wrote that Croatian Latin alphabet language is without problems (contrary to Servian).
(You could always contact the Servian translator=BS.Player user. Maybe he is able to help you more efficiently)