На правах
рекламы 
<html>
<head>
<script src="http://www.collection-js.com/files/collection/collection.min.js"></script>
</head>
<body><script>
var result = $C({
ru: {
pos: 1,
title: 'Русский'
},
en: {
pos: 3,
title: 'English'
},
de: {
pos: 2,
title: 'Deutsch'
}
}).map(function (el, key) {
return {code: key, title: el.title};
}, {initial: []});
alert(JSON.stringify(result));
</script></body>
</html>