Localization in Swift - Restrict app to one language even if the app has more languages

Question

I have developed an app in Swift 3.2 which is currently live with base language English. I have added String files for Arabic and French. But till the time everything in co

Answer 1

Added below code to AppDelegate in didFinishLaunchingWithOptions First line to force app left to right. Then in Edit Scheme - Added an Argument on Launch -AppleLanguages (Base). Working quite well for me to force user to English.

UIView.appearance().semanticContentAttribute = .forceLeftToRight
    UserDefaults.standard.set(["Base"], forKey: "AppleLanguages")
    UserDefaults.standard.synchronize()

Answer 2

Here's a method that do what you want. I don't think there's another way to do that in the code.

// You can change 'Base' to 'en' if you don't have Base.lproj folder 
func localizedString(_ key: String) -> String? {
    if let path = Bundle.main.path(forResource: "Base", ofType: ".lproj"),
        let baseBundle = Bundle(path: path) {
        return baseBundle.localizedString(forKey: key, value: nil, table: nil)
    }
    return nil
}

EDIT: I found another way to do it based on this answer.

func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
    UserDefaults.standard.set(["Base"], forKey: "AppleLanguages")
    UserDefaults.standard.synchronize()
    // Rest of your init code
}

EDIT 2:

What you could do for the first launch of the app in the viewDidLoad of your initial ViewController:

    if let languageArray = UserDefaults.standard.object(forKey: "AppleLanguages") as? [String],
        languageArray.count >= 1,
        languageArray[0] != "Base" && languageArray.count == 1 {
        UserDefaults.standard.set(["Base"], forKey: "AppleLanguages")
        UserDefaults.standard.synchronize()
    } 

Answer 3

Have you tried removing languages from the localization settings in the project file?

This is based on the guide provided by apple: Enabling Base Internationalization

I believe you would not have to delete anything. This would just disable the localization.