transliteration google api node js (eg of hindi here)

var googleTransliterate = require('google-transliterate');
var transliteration = '';
kk = googleTransliterate.transliterate('what is this buddha', 'en', 'hi', function(err, transliteration){
  console.log(transliteration);
  console.log(transliteration[0]['hws']);

  var fs = require('fs');
  fs.writeFile("./pk.txt", transliteration[0]['hws'], function(err) {
      if(err) {
          return console.log(err);
      }
      console.log("The file was saved!");
  });
});