How to Change App Multiple Language - localization at runtime in swift

See Videos -  Swift 4 :- How to Change iOS App Language OR Localization in iOS Hindi.

Then App Open Default Language -

Add Source code  - AppDelegate

@UIApplicationMain
	class AppDelegate: UIResponder, UIApplicationDelegate {
	let currentLanguage = "pt-PT"
	func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
	UserDefaults.standard.set(currentLanguage, forKey: "AppleLanguage")
	Bundle.swizzleLocalization()
	return true
	}
	}
	extension Bundle {
	static func swizzleLocalization() {
	let orginalSelector = #selector(localizedString(forKey:value:table:))
	guard let orginalMethod = class_getInstanceMethod(self, orginalSelector) else { return }
	let mySelector = #selector(myLocaLizedString(forKey:value:table:))
	guard let myMethod = class_getInstanceMethod(self, mySelector) else { return }
	if class_addMethod(self, orginalSelector, method_getImplementation(myMethod), method_getTypeEncoding(myMethod)) {
	class_replaceMethod(self, mySelector, method_getImplementation(orginalMethod), method_getTypeEncoding(orginalMethod))
	} else {
	method_exchangeImplementations(orginalMethod, myMethod)
	}
	}
	@objc private func myLocaLizedString(forKey key: String,value: String?, table: String?) -> String {
	guard let appDelegate = UIApplication.shared.delegate as? AppDelegate,
	let bundlePath = Bundle.main.path(forResource: appDelegate.currentLanguage, ofType: "lproj"),
	let bundle = Bundle(path: bundlePath) else {
	return Bundle.main.myLocaLizedString(forKey: key, value: value, table: table)
	}
	return bundle.myLocaLizedString(forKey: key, value: value, table: table)
	}

Let’s get started by choosing languages 😄

https://blog.calicastle.com/localization-in-ios-tutorial-using-swift-2f316105b447