我想将用户对当前语言的选择存储到UserDefaults。用户通过选择器选择他们喜欢的语言。然而，我不知道如何放置代码来更新UserDefaults。

下面是我的代码：

enum Language: Int, CaseIterable, Identifiable {
    case en
    case zh_hant
    
    var description: String {
        switch self {
        case.en:
            return "English"
        case.zh_hant:
            return "繁體中文"
        }
    }
    
    var id: Int {
        self.rawValue
    }
}

然后在我的模型课上：

final class ModelData: ObservableObject {
    // this is to be used as the default when the app is first launch.
    // However, if the user choose the language, the default should be retrieve from UserDefaults
    @Published var currentLanguage: Language = Language.en
}

和选择语言的用户界面：

struct ConfigurationView: View {
    
    @EnvironmentObject var modelData: ModelData
    
    let lang_title = ["Language", "語言"]

    var body: some View {
        List {
            VStack {
                HStack {
                    Text(lang_title[modelData.currentLanguage.rawValue]).font(.title2)
                    Spacer()
                }
                Picker("Language", selection: $modelData.currentLanguage) {
                    ForEach(Language.allCases, id: \.id) { language in
                        Text(language.description).tag(language)
                    }
                }
                .pickerStyle(SegmentedPickerStyle())
            }
            .padding()
        }

    }
}

我如何从UserDefaults加载所选语言并更新用户？