https://bugs.winehq.org/show_bug.cgi?id=53582
--- Comment #9 from Nikolay Sivov bunglehead@gmail.com --- Turns out it's different for different German locales as well:
1 L"de", name L"Sa" 2 L"de-AT", name L"Sa." 3 L"de-BE", name L"Sa." 4 L"de-CH", name L"Sa." 5 L"de-DE", name L"Sa" 6 L"de-DE_phoneb", name L"Sa" 7 L"de-IT", name L"Sa." 8 L"de-LI", name L"Sa." 9 L"de-LU", name L"Sa."
So yes, definitely some room for adjustments.