如何在swift / swiftUI中回退到默认的(英语)语言？

import SwiftUI

struct ContentView: View {
    @State private var selectedLanguage = UserDefaults.standard.string(forKey: "SelectedLanguage") ?? Locale.current.languageCode ?? "en"

    var body: some View {
        VStack {
            Text(NSLocalizedString("hello", comment: ""))
                .font(.title)
            
            Picker("Language", selection: $selectedLanguage) {
                Text("English").tag("en")
                Text("French").tag("fr")
                // 添加其他语言选项
            }
            .pickerStyle(SegmentedPickerStyle())
            .padding()
        }
        .onAppear {
            // 应用存储的语言设置
            Bundle.main.setLanguage(selectedLanguage)
        }
        .onChange(of: selectedLanguage) { newValue in
            // 存储用户选择的语言
            UserDefaults.standard.set(newValue, forKey: "SelectedLanguage")
            // 应用新的语言设置
            Bundle.main.setLanguage(newValue)
        }
    }
}

extension Bundle {
    func setLanguage(_ languageCode: String) {
        guard let path = Bundle.main.path(forResource: languageCode, ofType: "lproj") else {
            return
        }
        let bundle = Bundle(path: path)
        object_setClass(self, type(of: bundle!))
    }
}