/// <summary>
        /// Creates the localize.
        /// </summary>
        /// <param name="layout">Layout.</param>
        public void CreateLocalize(StackLayout layout)
        {
            // TODO: ローカライズ.
            var selectTitle = "言語選択";

            var label = new Label()
            {
                FontSize = 30,
                HorizontalTextAlignment = TextAlignment.Center,
                Text = selectTitle
            };

            layout.Children.Add(label);

            var realm = Realm.GetInstance();
            var mySetting = realm.All<SettingModel>().FirstOrNull();

            // ボタンを生成.
            List<Button> buttons = new List<Button>();
            var languageNames = new string[] { "ja", "kr", "en", "vi" };
            foreach (var language in languageNames)
            {
                string myLang = mySetting == null ? "ja" : mySetting.language;
                bool isEnable = (myLang != language);

                var button = new Button
                {
                    Text = language,
                    IsEnabled = isEnable
                };
                buttons.Add(button);

                layout.Children.Add(button);
                // TODO: ローカライズ.
                var dialogTitle = "変更完了";
                button.Clicked += (s, a) =>
                {
                    base.DisplayAlert(dialogTitle, language + "に変更されました", "OK");
                    // トランザクションを開始して、オブジェクトを更新します
                    using (var trans = Realm.GetInstance().BeginWrite())
                    {
                        // 再度取得が必須.
                        realm = Realm.GetInstance();
                        mySetting = realm.All<SettingModel>().FirstOrNull();
                        mySetting.language = language;
                        trans.Commit();
                    }

                    // ON/OFF切り替え.
                    foreach (var itemBtn in buttons)
                    {
                        bool isSelected = (itemBtn.Text == language);
                        itemBtn.IsEnabled = !isSelected;
                    }
                };
            }
        }