title: Aspell under Emacs - multiple dictonaries
body: <p>I'm using Aspell as a spelling checker for Emacs.
  I know that, as a standalone, aspell can handle multpiple dictionaries (using <code>extra-dicts</code> param), but how to configure it under Emacs?</p>
  
  <p>I know very little of emacs lisp... Could I provide some "ispell extra-args" in .emacs file? Would that work? If so I'd really appreciate simple example - I know very little of lisp syntax and absolute/relative paths it handles and etc.</p>
  
  <p>The reason why I need this is that I sometimes write some documentation in Polish with English words in it. That makes <code>spell-check-region</code> much less attractive task than it is using single language in a file.</p>
  
  <p>Thanks in advance!</p>