vim spellchecking: toggle/loop with F7 through none/nl/en_gb/en_us

.vimrc

@@ -48,6 +48,32 @@ let g:ctrlp_switch_buffer = 0
 
 " == Content convenience ======
 
+" Spell Check (http://vim.wikia.com/wiki/Toggle_spellcheck_with_function_keys)
+let b:myLang=0
+let g:myLangList=["nospell","nl","en_gb","en_us"]
+function! ToggleSpell()
+  let b:myLang=b:myLang+1
+  if b:myLang>=len(g:myLangList) | let b:myLang=0 | endif
+  if b:myLang==0
+    setlocal nospell
+  else
+    execute "setlocal spell spelllang=".get(g:myLangList, b:myLang)
+  endif
+  echo "spell checking language:" g:myLangList[b:myLang]
+endfunction
+
+nmap <silent> <F7> :call ToggleSpell()<CR>
+
+" In case the spelling language was set by other means than ToggleSpell() (a filetype autocommand say):
+if !exists( "b:myLang" )
+  if &spell
+    let b:myLang=index(g:myLangList, &spelllang)
+  else
+    let b:myLang=0
+  endif
+endif
+
+
 " Python autocompletion
 Plugin 'davidhalter/jedi-vim'
 " Code checker. For python, install flake8 or pylint, preferably in the