Programatically render a node in a specific language

Question

I want to render a node display programmatically for sending it to a search engine. It works ok but is ignoring the language and renders the field labels in the source language (which is English).

I use the following code for creating the teaser markup.

 $render_array_teaser = $view_builder->view($entity, 'compact_teaser', 'de');
 $rendered_teaser = $renderer->renderPlain($render_array_teaser);

The result gives me a teaser that includes a field named "field_sku" that has the label "SKU number". If I output the teaser in the browser the label gets correctly translated to German = "Artikelnummer" if the current language is "German".

If I render the teaser with the above code the label stays English even if I set the langcode parameter to 'de'.

How to get the teaser with German lables?

Answer 1

The field labels are used from the config translation system. You also need to set the config override language. See user_mail() in core.

  // Temporarily alter the language manager.
  $language_manager = \Drupal::languageManager();
  $langcode = $message['langcode'];
  $variables = array('user' => $params['account']);

  $language = \Drupal::languageManager()->getLanguage($params['account']->getPreferredLangcode());
  $original_language = $language_manager->getConfigOverrideLanguage();
  $language_manager->setConfigOverrideLanguage($language);
  $mail_config = \Drupal::config('user.mail');

  // Restore the language manager.
  $language_manager->setConfigOverrideLanguage($original_language);

Answer 2

Seems like this do not works anymore - see https://www.drupal.org/project/drupal/issues/3061599 :-(