title: Multi language in IOS APN (push notification)
body: <p>I am working on a booking app. And I would like to send a notification to user when there the booking status is update.</p>
  
  <p>So I write some json in server side like this:</p>
  
  <pre><code>{
    "aps":
    {
      "alert": "update status",
      "category" : "booking approve", //can be "booking cancel" , "booking reject"
    }
  }
  </code></pre>
  
  <p>And in the IOS side</p>
  
  <pre><code>func application(application: UIApplication, didReceiveRemoteNotification userInfo: [NSObject : AnyObject]) {
    let aps = userInfo["aps"] as! [String: AnyObject]
  
    // need to customize and create notification message here
  
  }
  </code></pre>
  
  <p>The problem is , how can I customized the message (according to the user language) after receive the status tag (e.g. booking approve) from the push notification?</p>
  
  <p>Thanks for helping. </p>