https://bugs.winehq.org/show_bug.cgi?id=54003
--- Comment #5 from François Gouget fgouget@codeweavers.com --- The 6895ad6f9c07 is the cause for the new failures in the hi and mx_MX locales. It turns out the relevant code page is the thread one, not the Windows ANSI code page. I sent a merge request to fix this: https://gitlab.winehq.org/wine/wine/-/merge_requests/2254