.js

function bingTranslate(message,originLang,destLang,accessToken){
  Promise.try(function(){
    accessToken.then(function(bingToken){
      options = { 
        headers:{
                  'Authorization': "Bearer "+accessToken
                }   
      };  
      queryString="text="+encodeURIComponent(message)+"&from="+originLang+"&to="+destLang+"&contentType=text%2Fplain";
      return bhttp.get("http://api.microsofttranslator.com/V2/Http.svc/Translate?"+queryString,options).then(function(data){
        return xml.parseBuffer(data.body).childs[0];  
      })
    })  
  }); 
}