Ember: count number of objects in object?

I have data that looks roughly like this:

"id": "1",
"slug": "WD",
"name": {
    "en": "Working Draft",
    "de": "Arbeitsentwurf",
    "fr": "Version de travail",
    "ja": "草案",
    "ru": "Рабочий черновик"
}

And I am passing the name object to a component:

{{title-name name=model.name lang='en'}}

In the component template I would like to output the number of translations

<p>Translated {{translationCount}} times.</p>

I tried a few different things in my component to come up with this total but none of them work. How would I count the number of objects?

export default Ember.Component.extend({
   // did not work:    
   translationCount: Ember.computed.alias('Object.keys(name).length'),
   // did not work:
   // translationCount: Ember.computed.alias('name.length'),
});