.js

function bingTranslate(message,originLang,destLang,accessToken){
  Promise.try(function(){
    accessToken.then(function(bingToken){
      options = { 
        headers:{
                  'Authorization': "Bearer "+bingToken
                }   
      };  
      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]; 
    })
  })  
}