https://bugs.winehq.org/show_bug.cgi?id=57554
--- Comment #5 from Rafał Mużyło galtgendo@o2.pl --- Pretty much only valid part of this is:
winecfg cannot set the System to other font or adjust the font fallback
as that would be nice to have; the rest goes under: well, duh.
Yes, it would be nice if FontSubstitutes for CJK system fonts (and a few other non-Latin scripts) could be set though an easier gui method, than going into regedit.