private JPanel placeTextFields(){
        final int ROWS = 2;
        final int COLUMNS = 2;
        GridLayout layout = new GridLayout(ROWS, COLUMNS);
        layout.setHgap(10);
        layout.setVgap(10);
        JPanel panel = new JPanel(layout);
        oldValue = new JTextField("Old value");
        oldValue.setEditable(false);

        oldTranslation = new JTextField("Old translation");
        oldTranslation.setEditable(false);

        newValue = new JTextField();
        newTranslation = new JTextField();

        panel.add(oldValue);
        panel.add(oldTranslation);
        panel.add(newValue);
        panel.add(newTranslation);

        return panel;
    }