Global Locale Language Manager in Swift 2.3 [Supports Localized Storyboards]

Locale.swift

class Locale {
    static var language: String {
        set{
            defaults.setObject(newValue, forKey: "currentLanguage")
            defaults.synchronize()
        }
        get{
            if let currentLanguage: String = defaults.stringForKey("currentLanguage"){
                return currentLanguage
            }
            return NSLocale.getTopPreferredLanguage()
        }
    }

    static func currentLanguageBundle() -> NSBundle {
        if let path = NSBundle.mainBundle().pathForResource(language, ofType: "lproj") {
            return NSBundle(path: path)!
        } else {
            language = "en"
            return NSBundle(path: NSBundle.mainBundle().pathForResource(language, ofType: "lproj")!)!
        }
    }
}

extension NSLocale {
    static func getTopPreferredLanguage() -> String {
        return NSLocale.preferredLanguages()[0]
    }
    
    static func getTopPreferredCountryCode() -> String {
        let locale = NSLocale(localeIdentifier: self.getTopPreferredLanguage())
        return locale.objectForKey(NSLocaleCountryCode) as! String
    }
}

extension String {
    var localized: String {
        return Locale.currentLanguageBundle().localizedStringForKey(self, value: "", table: nil)
    }
}