https://bugs.winehq.org/show_bug.cgi?id=39297
--- Comment #5 from Nikolay Sivov bunglehead@gmail.com --- The question is does this tool work on Windows for same fonts? (please name them if it's possible, I can test it if you don't have access to Windows machine).
Another easy thing to try is to add test with this cp number for GetCPInfoEx for example, to see if it works at all and if it does see what's returned as a name.