Using Vim8 with german hunspell files.
Created german dictionary file using this command from within Vim:
mkspell ~/.vim/spell/de /usr/share/hunspell/de_AT.aff
This resulted in some error messages Unrecognized flags in /usr/share/hunspell/de_AT.aff line xxx: ...
The dictionary file size in ~/.vim/spell is
15437 Dez 14 13:58 de.utf-8.spl
Activating german spell checking using
:setlocal spell spelllang=de
However every word is identified to be spelled wrong and the vim command z=
results in the error message Sorry, no suggestions
How can I enable spell checking using german hunspell dictionary files using vim?