Get a real OS
or play englando .flow/2kki
That's the complete opposite.
I have REVERSE mojibake.
English literals are all stuck as squares!
What he said wasn't really worthless advice. If you are using WINE, you might as well just buy a cheap used computer with Windows or get a VM to play the games with no real issues.
Are you really going to waste time that could be spent playing these fangames because "MS went to hell"? No offense, but that's really stupid.
This is true, Windows is fine.
I do think, however, that everyone who wants to should install (desktop) Linux on their computer so they can discover the good sense they need to stop using it as soon as possible.
VM or GPU Passthrough if he doesn't want to dualboot Windows.
The only thing I can think of right now is "update Wine", unfortunately. I don't have this issue when running a English-translated Yume Nikki in Japanese locale (mojibake filenames are a mess, so I ran the installer in Japanese locale), but if using certain distributions, your Wine is probably extremely out of date, so that's the best guess I can give.
(If your Wine version is still 1.something, then it is definitely out of date.)