Swift NSLocale Simulator iOS 8

问题

I'm having an issue with Swift and the iOS 8 Emulator in XCode 6.1.

Indeed when I try to use NSLocale, almost every functions of it return nil.

Here is how I use it:

let cc = "fr" // Example
let locale = NSLocale.currentLocale()
let countryName = locale.displayNameForKey(NSLocaleCountryCode, value : cc)
println(countryName) // Shows : nil

It does work on device, iOS 7 and iOS 8 and on simulator iOS 7. It doesn't work on simulator iOS 8 and on Playground, it even EXC_BAD_ACCESS. I guess it's just a simulator and Playground problem, but it's weird still. And I wish to know if anyone has a workaround from it.

I did clean derived data, restarted and clean datas of simulator. Not getting better.