How to change the value of the Submit button text when extending ConfigFormBase I need to change the value of the Submit button text when extending ConfigFormBase. What is the correct way to do it?
The submit button is defined in the base class and you can change it:

  public function buildForm(array $form, FormStateInterface $form_state) {
    $form = parent::buildForm($form, $form_state);
    $form['actions']['submit']['#value'] = $this-&gt;t('Save my configuration');
    ...