https://bugs.winehq.org/show_bug.cgi?id=50151
--- Comment #9 from Piotr Caban piotr.caban@gmail.com --- I can reproduce the problem. The game uses locale set to: LC_COLLATE=C;LC_CTYPE=C;LC_MONETARY=C;LC_NUMERIC=C;LC_TIME=Japanese_Japan.932 and asks for week day using "%a" format. After the patch, we're using WCHAR name and convert it to current encoding. This fails since LC_CTYPE is set to C locale. I will do some testing to figure out what's the correct fix.