Thanks for your findings, I'll take a look once I've time for this, need to finish some other things first.
I also think you can add multiple fallbacks to one font
You're right, in Windows these are the default CJK fonts:
Chinese:
Microsoft YaHei
Microsoft JhengHei
Japanese:
Meiryo ( was the default in XP/Vista )
MS Gothic
Yu Gothic
Korean:
Malgun Gothic
If you take a look at the Windows registry it looks like this:
Fallbacks for Segoe UI:
TAHOMA.TTF,Tahoma
MEIRYO.TTC,Meiryo UI,128,96
MEIRYO.TTC,Meiryo UI
MSGOTHIC.TTC,MS UI Gothic
MSJH.TTC,Microsoft JhengHei UI,128,96
MSJH.TTC,Microsoft JhengHei UI
MSYH.TTC,Microsoft YaHei UI,128,96
MSYH.TTC,Microsoft YaHei UI
MALGUN.TTF,Malgun Gothic,128,96
MALGUN.TTF,Malgun Gothic
MINGLIU.TTC,PMingLiU
SIMSUN.TTC,SimSun
GULIM.TTC,Gulim
YUGOTHM.TTC,Yu Gothic UI,128,96
YUGOTHM.TTC,Yu Gothic UI
SEGUISYM.TTF,Segoe UI Symbol
Fallbacks for the default CJK fonts:
So you will just need to add it to your registry and I guess it should work the same.
If you take a look at this here, there are the listed Wine CJK font fallbacks for the default Windows CJK fonts.
I would personally first manually install the CJK fallback fonts in the right font directory and add/import the fallback links
( for the fonts you're using in the theme ) to the Wine registry. And then run sudo fc-cache -f -v to clear the font cache.
P.S: You can also install only the CJK fonts via winetricks ( I don't think you need to install allfonts ), there is also a lot of stuff
if you search "wine cjk fonts" or "winetricks cjk fonts" in Google.
P.P.S: I saw in your first screenshot that you did not change the DPI in Wine via registry or Winecfg, that is why you have such small
context menus. Take a look at this here or via registry.
-TT