Launch arguments (NSDoubleLocalizedStrings, NSShowNonLocalizedStrings) don't work

I'm trying to use the launch arguments such as NSDoubleLocalizedStrings and NSShowNonLocalizedStrings to test localization in my Objective-C project. For some reason I couldn't get neither of them to work. I tried to set both arguments on launch and options in scheme settings: Also I've checked NSUserDefaults keys and they both are YES. But the arguments still don't work.

To make sure it's not an XCode bug I've created absolutely new single-view project on Objective-C and Swift with one label on the view. Both projects had empty Localizable.strings files and the code in these projects was the following:

@interface ViewController ()
@property (nonatomic, strong) IBOutlet UILabel *label;
@end

@implementation ViewController
- (void)viewDidLoad {
    [super viewDidLoad];
    self.label.text = NSLocalizedString(@"Some text", nil);
}
@end

and

class ViewController: UIViewController {
    @IBOutlet var label: UILabel!

    override func viewDidLoad() {
        super.viewDidLoad()
        label.text = NSLocalizedString("Some text", comment: "")
    }
}

The result looked like this:

So here are the questions:

1) What could be the reasons launch arguments don't work in my Objective-C project?

2) Why NSDoubleLocalizedStrings argument doesn't work in Swift?