I have implemented a LocaleComboBox extending from ComboBox that display a list of locales to the user.
Using a CellFactory I'm rendering the locales as i18ned labels.

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        this.setItems(FXCollections.observableArrayList(locales));
              
        //render Locales using their localized labels
        this.setCellFactory(new Callback<ListView<Locale>, ListCell<Locale>>() {
                @Override public ListCell<Locale> call(ListView<Locale> list) {
                    return new ListCell<Locale>() {
                        @Override protected void updateItem(Locale item, boolean empty) {
                            super.updateItem(item, empty);
                            setText(item == null ? "" : ImperiaResourceBundle.getBundle().getString("gui.locale."+item.toString()));
                        }
                    };
                }
        });
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While this approach used to work in 2.1, it does not work entirely in 2.2, because the selected item is not rendered like the items in the dropdown.
The items in the dropdown are rendered correctly i.e ("English", "German", "French"), but the selected item is rendered as "en", "de", "fr" instead...