https://bugs.winehq.org/show_bug.cgi?id=52805
--- Comment #1 from Rafał Mużyło galtgendo@o2.pl --- ...it might be a bit more complicated...
Did you try to pipe it to less ? cause chances are you'd get the string you expect then...
So, wine seems to be setting output encoding (not through reencoding, but setting up the output descriptor wrong) not quite right. I've seen something similar in some Unity games where some of the localized debug messages were mojibake...unless piped to less (or perhaps it was through tee to a file - don't fully recall that).