Problem With Letters

Hello, i've recently installed mac version of mp3tag (with intergrated wine) on my mac and i noticed that Greek letters not appearing correctly. I Have tried to add new fonts on disk_c/windows/fonts (wine's folder) with no success. is that any way to change the default font of the software or any other way to fix this. I Asked a friend from russia and he has the same problem with russian letters. I'm uploading a photo of my mp3tag running.
Thanks in advance.

Does this affect the tags or only the filenames?
Looking at the screendump I would say that the OS does not report the correct character set. You would have to twiddle with the codepage for that OS to get it right.
I do not know how that works.