As for b96, asian symbols are not rendered in ChoiceBox (see attached image).
In at least b93 they were.

To reproduce, you can use the following code (taken from UI control samples on docs page):

package choiceboxsample;

import javafx.scene.Group;
import javafx.application.Application;
import javafx.beans.value.ChangeListener;
import javafx.beans.value.ObservableValue;
import javafx.collections.FXCollections;
import javafx.geometry.Insets;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.ChoiceBox;
import javafx.scene.control.Label;
import javafx.scene.control.Tooltip;
import javafx.scene.layout.HBox;
import javafx.scene.paint.Color;
import javafx.scene.shape.Rectangle;
import javafx.scene.text.Font;
import javafx.stage.Stage;

public class ChoiceBoxSample extends Application {

    Rectangle rect = new Rectangle(150, 30);
    final Label label = new Label("Hello");

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) {
        Scene scene = new Scene(new Group());
        scene.setFill(Color.ALICEBLUE);
        stage.setScene(scene);
        stage.show();

        stage.setTitle("ChoiceBox Sample");
        stage.setWidth(300);
        stage.setHeight(200);
      
        label.setFont(Font.font("Arial", 25));
        label.setLayoutX(40);

        final String[] greetings = new String[]{"Hello", "Hola", "Привет", "你好",
            "こんにちは"};
        final ChoiceBox cb = new ChoiceBox(FXCollections.observableArrayList(
            "English", "Español", "Русский", "简体中文", "日本語")
        );
                     
       cb.getSelectionModel().selectedIndexProperty().addListener(new
            ChangeListener<Number>() {
                public void changed(ObservableValue ov,
                    Number value, Number new_value) {
                        label.setText(greetings[new_value.intValue()]);
            }
        });
       
        cb.setTooltip(new Tooltip("Select the language"));
        cb.setValue("English");
        HBox hb = new HBox();
        hb.getChildren().addAll(cb, label);
        hb.setSpacing(30);
        hb.setAlignment(Pos.CENTER);
        hb.setPadding(new Insets(10, 0, 0, 10));

        ((Group) scene.getRoot()).getChildren().add(hb);
        
    }
}