ctypes raises UnicodeDecodeError in german windows (it should print
'Unzulässige Funktion'):

>>> from ctypes import FormatError
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>>> FormatError(1)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
UnicodeDecodeError: 'utf8' codec can't decode bytes in position 5-7:
invalid data
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>>>