Translation of standard buttons in MessageDialog ?

[Tullhead]

Here is lovely and simple code to make a MessageDialog. I have a few questions:

1. I cannot find any mention of how one causes the standard buttons (e.g. "Yes") to be translated into another language (e.g. "Ja" in German).
2. I find examples stating that there is a property that one can set "modal: true" - but this doesn't seem to exist. Does it mean the example I've seen was an earlier version of MessageDialog, and the newer version has lost features?
3. Of lesser importance, but of interest: in QML it seems easy to specify fonts, colors, radios of rectangles - but I can't seem to get any of that stuff to work to make the MessageDialog look nicer. What's up with that?

If I want these things, must I abandon MessageDialog and do it all myself from scratch?

Thanks for any hints you can give me!

  MessageDialog
  {
     id: notificationPopup
     title: qsTr("Please Confirm")
     text: qsTr("Click 'Yes' to switch to the new language.")
     informativeText: qsTr("When you select 'Yes' the program will close.")
     detailedText: qsTr("After the program closes, just re-start it, and the new language will be shown.")
     buttons: Dialog.Yes | Dialog.Cancel

     onButtonClicked: function(button, role) 
     {
        switch (button) 
        {
           case MessageDialog.Yes:
                GUISettings.curLangIndex = langSelect.currentIndex
                Qt.quit();
                break;

           case MessageDialog.Cancel:
                // restore combo selection - this makes ComboBox redraw
                GUISettings.curLangIndexChanged();
                break;
        }
     }
  }

[Tullhead]

Answering my own question -- well, I switched from using "MessageDialog" to instead using "Dialog" then used a footer of type DialogButtonBox, and finally could make translation happen by using "onOpened" -- below is partial of my Dialog...

        footer: DialogButtonBox 
        {
            id: buttons
            font.pointSize: medButTextSize
            font.bold: stnButtonTextBold
            
            alignment: Qt.AlignRight | Qt.AlignBottom
            buttonLayout: Qt.WinLayout                   // puts 'Cancel' button on the right 
            standardButtons: Dialog.Cancel | Dialog.Yes   
        }

        onOpened: 
        {
            buttons.standardButton(Dialog.Yes).text = qsTr("Yes");
            buttons.standardButton(Dialog.Cancel).text = qsTr("Cancel");
        }