class CommentTranslationHandler

class CommentTranslationHandler extends ContentTranslationHandler {
    
    /**
     * {@inheritdoc}
     */
    public function entityFormAlter(array &$form, FormStateInterface $form_state, EntityInterface $entity) {
        parent::entityFormAlter($form, $form_state, $entity);
        if (isset($form['content_translation'])) {
            // We do not need to show these values on comment forms: they inherit the
            // basic comment property values.
            $form['content_translation']['status']['#access'] = FALSE;
            $form['content_translation']['name']['#access'] = FALSE;
            $form['content_translation']['created']['#access'] = FALSE;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    protected function entityFormTitle(EntityInterface $entity) {
        return t('Edit comment @subject', [
            '@subject' => $entity->label(),
        ]);
    }
    
    /**
     * {@inheritdoc}
     */
    public function entityFormEntityBuild($entity_type, EntityInterface $entity, array $form, FormStateInterface $form_state) {
        if ($form_state->hasValue('content_translation')) {
            $translation =& $form_state->getValue('content_translation');
            
            /** @var \Drupal\comment\CommentInterface $entity */
            $translation['status'] = $entity->isPublished();
            $translation['name'] = $entity->getAuthorName();
        }
        parent::entityFormEntityBuild($entity_type, $entity, $form, $form_state);
    }

}