Function factory using closure in js

function-factory.js

function makeGreeting(language) {
  return function (name) {
    if (language == 'en') {
      console.log('Hello ' + name);
    }
    else if (language == 'es') {
      console.log('Hola ' + name);
    }
  };
}

// each function call will create its closure with the language passed
// so the 'language' for greetEnglish and greetSpanish will be different
var greetEnglish = makeGreeting('en');
var greetSpanish = makeGreeting('es');

greetEnglish('foobar'); // Hello foobar
greetSpanish('foobar'); // Hola foobar