spell-checkvim
In my blog I write blog posts in German language. But as my blog is mostly about technology, there are many English words appearing as well.
I recently enabled German spell-checking in vim with
set spell spelllang=de_de
Of course, it is highlighting all the English words now. Is there any way to use en_US and de_DE at the same time?
The latest source code and runtime files can be downloaded via FTP or retrieved from Mercurial; see vim.org for details.
My current version of $VIMRUNTIME/syntax/cpp.vim is from 2002 Jul 15, a time when Vim 6.1 was current. Indeed, many syntax files do not yet use the spell checking support introduced in Vim 7.0. The only way to fix this is to volunteer and add these definitions, and then send a patch to the original maintainer or start maintaining the file yourself.
This is an old question but this might be the right answer.
The reasoning: Seems that group policies take precedency over user Settings.
gpedit.msc (just type into the search/Cortana and click the first option)User Configuration > Administrative Templates > Control Panel > Regional and Language OptionsEnable both Turn off autocorrect... and Turn off highlight... 
Best Answer
:help 'spelllang'tells that the option can contain "A comma separated list of word list names." So, the following should work already: