title: How to get current language with ngx-translate in angular2
body: <p>I want to get current language with <code>this.translate.getBrowserLang()</code>, but it always return 'en', whatever the current language is and what the supported languages is.</p>
  
  <p>Here is the plnkr: <a href="https://plnkr.co/edit/JEXgj8WcISYGtDg75VoR?p=preview" rel="noreferrer">https://plnkr.co/edit/JEXgj8WcISYGtDg75VoR?p=preview</a>,</p>
  
  <hr>
  
  <p>maybe plnkr has broken, you can try stackblitz: <a href="https://stackblitz.com/edit/github-kk1mud-a7gxbb" rel="noreferrer">https://stackblitz.com/edit/github-kk1mud-a7gxbb</a></p>