QMessageBox change text of standard button

I want to use QMessageBox.Question for the icon. But i want to change the text of standard buttons. I do not want the text of buttons to be the "Yes" and "No". I want them to be "Evet" and "Iptal". Here my codes.

choice = QtGui.QMessageBox.question(self, 'Kaydet!',
                                    'Kaydetmek İstediğinize Emin Misiniz?',
                                    QtGui.QMessageBox.Yes | QtGui.QMessageBox.No)