content_translation_language_configuration_element_validate

content_translation_language_configuration_element_validate($element, FormStateInterface $form_state, array $form)

function content_translation_language_configuration_element_validate($element, FormStateInterface $form_state, array $form) {
  $key = $form_state->get(['content_translation', 'key']);
  $values = $form_state->getValue($key);
  if (!$values['language_alterable'] && $values['content_translation'] && \Drupal::languageManager()->isLanguageLocked($values['langcode'])) {
    foreach (\Drupal::languageManager()->getLanguages(LanguageInterface::STATE_LOCKED) as $language) {
      $locked_languages[] = $language->getName();
    }
    // @todo Set the correct form element name as soon as the element parents
    //   are correctly set. We should be using NestedArray::getValue() but for
    //   now we cannot.
    $form_state->setErrorByName('', t('"Show language selector" is not compatible with translating content that has default language: %choice. Either do not hide the language selector or pick a specific language.', array('%choice' => $locked_languages[$values['langcode']])));
  }
}