title: What's NSLocalizedString equivalent in Swift?
body: <p>Is there an Swift equivalent of <code>NSLocalizedString(...)</code>?
  In <code>Objective-C</code>, we usually use:</p>
  
  <pre><code>NSString *string = NSLocalizedString(@"key", @"comment");
  </code></pre>
  
  <p>How can I achieve the same in Swift? I found a function:</p>
  
  <pre><code>func NSLocalizedString(
      key: String,
      tableName: String? = default,
      bundle: NSBundle = default,
      value: String = default,
      #comment: String) -&gt; String
  </code></pre>
  
  <p>However, it is very long and not convenient at all.</p>