NodeTranslationHandler::entityFormAlter

public NodeTranslationHandler::entityFormAlter(array &$form, FormStateInterface $form_state, EntityInterface $entity)

public function entityFormAlter(array &$form, FormStateInterface $form_state, EntityInterface $entity) {
  parent::entityFormAlter($form, $form_state, $entity);

  // Move the translation fieldset to a vertical tab.
  if (isset($form['content_translation'])) {
    $form['content_translation'] += array(
      '#group' => 'advanced',
      '#attributes' => array(
        'class' => array('node-translation-options'),
      ),
    );

    $form['content_translation']['#weight'] = 100;

    // We do not need to show these values on node forms: they inherit the
    // basic node property values.
    $form['content_translation']['status']['#access'] = FALSE;
    $form['content_translation']['name']['#access'] = FALSE;
    $form['content_translation']['created']['#access'] = FALSE;
  }

  $form_object = $form_state->getFormObject();
  $form_langcode = $form_object->getFormLangcode($form_state);
  $translations = $entity->getTranslationLanguages();
  $status_translatable = NULL;
  // Change the submit button labels if there was a status field they affect
  // in which case their publishing / unpublishing may or may not apply
  // to all translations.
  if (!$entity->isNew() && (!isset($translations[$form_langcode]) || count($translations) > 1)) {
    foreach ($entity->getFieldDefinitions() as $property_name => $definition) {
      if ($property_name == 'status') {
        $status_translatable = $definition->isTranslatable();
      }
    }
    if (isset($status_translatable)) {
      foreach (array('publish', 'unpublish', 'submit') as $button) {
        if (isset($form['actions'][$button])) {
          $form['actions'][$button]['#value'] .= ' ' . ($status_translatable ? t('(this translation)') : t('(all translations)'));
        }
      }
    }
  }
}