How to translate (russify) the context menu in JavaFX?

Question

Java

Good afternoon!
Task: Russify the menu drop-down when RMB is pressed on Textfield and TextArea in JavaFX.
Haven't used .properties in Java before.
Following fragmentary information collected in Google, I created a strings_ru.properties file, in which I placed:
TextInputControl.menu.Undo=Cancel
TextInputControl.menu.Redo=Redo
And so on.
Please advise what to do with this file next?
Now the code looks like this:
boundle = ResourceBundle.getBundle("strings", new Locale("ru"));
Stage Form=new Stage();
Parent root = FXMLLoader.load(getClass().getResource("FXML/Form.FXML", boundle)
Form.setScene(new Scene(root));
Form.show();
After launch, no changes in the drop-down menu occur, as if my properties were not used.
What is missing, what did you do wrong?