Change default locale language in JavaFx Alert

Question

I am fairly new to Java and JavaFX. I am writing a program where it will recognize the default locale from the users location. I have been able to get the normal buttons and text to change to the default lang when I test it for French and English, but cant find a resource on how to change it for the Alert Confirmation below. Your help is appreciated.

SEE IMAGE

@FXML
    private void handleExit(ActionEvent event) {
            Alert alert = new Alert(Alert.AlertType.CONFIRMATION);
            alert.setTitle("Exit");
            alert.setHeaderText("Do you wish to exit the program?");
            alert.showAndWait()
            .filter(response -> response == ButtonType.OK)
            .ifPresent((ButtonType response) -> {
            Platform.exit();
            System.exit(0);
                }
            );
    }