title: String pluralizer with NSNumberFormatter
body: <p>I want to display a nicely formatted integer value via the usual pluralization technology <code>.stringsdict</code> file. (Apple docs <a href="https://developer.apple.com/library/content/documentation/MacOSX/Conceptual/BPInternational/StringsdictFileFormat/StringsdictFileFormat.html" rel="nofollow noreferrer">here.</a>)</p>
  
  <p>So if I have one thing, I want my output to read</p>
  
  <blockquote>
    <p>1 thing</p>
  </blockquote>
  
  <p>But if I have two thousand, three hundred sixty-four things, I want those commas:</p>
  
  <blockquote>
    <p>2,364 things</p>
  </blockquote>
  
  <p>but alas the string pluralization technology doesn't give them to me:</p>
  
  <blockquote>
    <p>2364 things</p>
  </blockquote>
  
  <p>I can achieve commas with an <a href="https://developer.apple.com/documentation/foundation/numberformatter" rel="nofollow noreferrer"><code>NSNumberFormatter</code></a>. I can achieve  pluralization with <code>.stringsdict</code> localization technology.</p>
  
  <p>Can I easily achieve both?</p>