diff --git a/core/lib/Drupal/Core/Entity/Annotation/EntityType.php b/core/lib/Drupal/Core/Entity/Annotation/EntityType.php
index b5a0401..ffa31a0 100644
--- a/core/lib/Drupal/Core/Entity/Annotation/EntityType.php
+++ b/core/lib/Drupal/Core/Entity/Annotation/EntityType.php
@@ -60,13 +60,4 @@ public function get() {
     return new $class($values);
   }
 
-  /**
-   * Translates a string to the current language or to a given language.
-   *
-   * See the t() documentation for details.
-   */
-  protected function t($string, array $args = array(), array $options = array()) {
-    return \Drupal::translation()->translate($string, $args, $options);
-  }
-
 }
diff --git a/core/lib/Drupal/Core/Entity/EntityManager.php b/core/lib/Drupal/Core/Entity/EntityManager.php
index 2b93b36..bc3e563 100644
--- a/core/lib/Drupal/Core/Entity/EntityManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityManager.php
@@ -22,6 +22,7 @@
 use Drupal\Core\Plugin\Discovery\CacheDecorator;
 use Drupal\Core\Plugin\Discovery\AnnotatedClassDiscovery;
 use Drupal\Core\Plugin\Discovery\InfoHookDecorator;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\Core\StringTranslation\TranslationInterface;
 use Drupal\Core\TypedData\TranslatableInterface;
 use Symfony\Component\DependencyInjection\ContainerAwareInterface;
@@ -44,6 +45,7 @@
 class EntityManager extends PluginManagerBase implements EntityManagerInterface, ContainerAwareInterface  {
 
   use ContainerAwareTrait;
+  use StringTranslationTrait;
 
   /**
    * Extra fields by bundle.
@@ -817,13 +819,4 @@ protected function getDisplayModeOptions($display_type, $entity_type_id, $includ
     return $options;
   }
 
-  /**
-   * Translates a string to the current language or to a given language.
-   *
-   * See the t() documentation for details.
-   */
-  protected function t($string, array $args = array(), array $options = array()) {
-    return $this->translationManager->translate($string, $args, $options);
-  }
-
 }
diff --git a/core/lib/Drupal/Core/Entity/EntityType.php b/core/lib/Drupal/Core/Entity/EntityType.php
index 7ad2a7c..5be662f 100644
--- a/core/lib/Drupal/Core/Entity/EntityType.php
+++ b/core/lib/Drupal/Core/Entity/EntityType.php
@@ -10,12 +10,15 @@
 use Drupal\Component\Utility\String;
 use Drupal\Component\Utility\Unicode;
 use Drupal\Core\Entity\Exception\EntityTypeIdLengthException;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Provides an implementation of an entity type and its metadata.
  */
 class EntityType implements EntityTypeInterface {
 
+  use StringTranslationTrait;
+
   /**
    * Indicates whether entities should be statically cached.
    *
@@ -627,13 +630,4 @@ public function getGroupLabel() {
     return !empty($this->group_label) ? $this->group_label : $this->t('Other', array(), array('context' => 'Entity type group'));
   }
 
-  /**
-   * Translates a string to the current language or to a given language.
-   *
-   * See the t() documentation for details.
-   */
-  protected function t($string, array $args = array(), array $options = array()) {
-    return \Drupal::translation()->translate($string, $args, $options);
-  }
-
 }