Spell checking in vim is very easy and just needs the following command:
:set spell spelllang=en_us
This will highlight all misspelled words. To turn off the spell checker just type in command-mode:
:set nospell
For german language we need a few files:
mkdir -p $HOME/.vim/spell
wget -P ~/.vim/spell/ http://ftp.vim.org/vim/runtime/spell/de.utf-8.spl
wget -P ~/.vim/spell/ http://ftp.vim.org/vim/runtime/spell/de.utf-8.sug
Now we can use the following vim-command to enable the german spell checker:
:set spell spelllang=de
