https://bugs.winehq.org/show_bug.cgi?id=9583
--- Comment #31 from VZ vz-wine@zeitlins.org --- Sorry, but this doesn't seem to be really fixed for me with Wine 7.0.
E.g. CompareStringEx("de-DE", NORM_IGNORECASE, "ß", "ss") yields 0 under native MSW but -1 with Wine. And CompareStringEx("sv", 0, "ä", "ae") gives -1 instead of the expected 1 for Swedish sort order.