Issue #3185016 by hanoii: Translation filter

src/TwigExtension.php

@@ -393,6 +393,19 @@ class TwigExtension extends AbstractExtension {
       //   {{ node.field_media|file_url }}
       // @endcode
       new TwigFilter('file_url', [$this, 'fileUrl']),
+
+      // - Entity translation -
+      //
+      // Gets the translation of the entity for the current context.
+      // @code
+      //   {{ node|translation }}
+      // @endcode
+      //
+      // An optional language code can be specified.
+      // @code
+      //   {{ node|translation('es') }}
+      // @endcode
+      new TwigFilter('translation', [$this, 'entityTranslation']),
     ];
 
     if (Settings::get('twig_tweak_enable_php_filter')) {
@@ -1319,4 +1332,20 @@ class TwigExtension extends AbstractExtension {
     return $output;
   }
 
+  /**
+   * Returns the tranlation for the given entity.
+   *
+   * @param object $entity
+   *   The entity to get the translation from.
+   *
+   * @param string $langcode
+   *   (optional) For which language the trnaslation should be looked for,
+   *   defaults to the current language context.
+   *
+   * @return EntityInterface
+   *   The appropriate translation for the given language context.
+   */
+  public function entityTranslation(EntityInterface $entity, $langcode = NULL) {
+    return \Drupal::service('entity.repository')->getTranslationFromContext($entity, $langcode);
+  }
 }