Hi, @nikola-androić,
Sorry to be late :-(( I was building a list of, both, monospaced and proportional fonts, which could support the ISO 8859-16 encoding and I, also, updated my own list of valuable monospaced fonts for Notepad++ :-))
However, to possibly solve your problem, it would be better to test with the real file, indeed ! So, could you, please, send me, by e-mail, your subtitle Croatian file, or part of it, in case of important size ?
Of course, I would fully understand if you do not accept because of confidential or personal data !!
My e-mail address is :
Best regards,
guy038