title: UITextView custom spelling and autocorrect
body: <p>I want to make an iOS text editor for a certain rare human language, and I want it to support my own spell checking and autocorrect systems for that language.</p>
  
  <p><strong>In iOS, is it possible to get UITextView to use a custom spell checker and autocorrect system, rather than those of the system's current locale?</strong> Or do I have to resort to creating a text view from scratch using Core Text?</p>