nslocale - How to get current language code with Swift?

Question

I want get the language code of the device (en, es...) in my app written with Swift. How can get this?

I'm trying this:

var preferredLanguages : NSLocale!
let pre = preferredLanguages.displayNameForKey(NSLocaleIdentifier, value: preferredLanguages)

But this returns nil.

Answer 1

In Swift 3

let langStr = Locale.current.languageCode