https://bugs.winehq.org/show_bug.cgi?id=52362
--- Comment #7 from Rafał Mużyło galtgendo@o2.pl --- ...you know, it can be something zh specific after all...
Going by one of the tests for kernel32, zh_CN and zh_Hans are mapped to each other, but perhaps here we're hitting a portion of the code where the mapping is incomplete...but if that would be the case why didn't it work when you copied one dir to the other ?