diff --git a/core/lib/Drupal/Core/Datetime/Date.php b/core/lib/Drupal/Core/Datetime/Date.php
index 5c2b92b..a98986d 100644
--- a/core/lib/Drupal/Core/Datetime/Date.php
+++ b/core/lib/Drupal/Core/Datetime/Date.php
@@ -14,12 +14,15 @@
 use Drupal\Core\Language\Language;
 use Drupal\Core\Language\LanguageManagerInterface;
 use Drupal\Core\StringTranslation\TranslationInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Provides a service to handler various date related functionality.
  */
 class Date {
 
+  use StringTranslationTrait;
+
   /**
    * The list of loaded timezones.
    *
@@ -85,7 +88,7 @@ class Date {
   public function __construct(EntityManagerInterface $entity_manager, LanguageManagerInterface $language_manager, TranslationInterface $translation, ConfigFactoryInterface $config_factory) {
     $this->dateFormatStorage = $entity_manager->getStorageController('date_format');
     $this->languageManager = $language_manager;
-    $this->stringTranslation = $translation;
+    $this->translationManager = $translation;
     $this->configFactory = $config_factory;
   }
 
@@ -181,7 +184,7 @@ public function formatInterval($interval, $granularity = 2, $langcode = NULL) {
     foreach ($this->units as $key => $value) {
       $key = explode('|', $key);
       if ($interval >= $value) {
-        $output .= ($output ? ' ' : '') . $this->stringTranslation->formatPlural(floor($interval / $value), $key[0], $key[1], array(), array('langcode' => $langcode));
+        $output .= ($output ? ' ' : '') . $this->formatPlural(floor($interval / $value), $key[0], $key[1], array(), array('langcode' => $langcode));
         $interval %= $value;
         $granularity--;
       }
@@ -194,15 +197,6 @@ public function formatInterval($interval, $granularity = 2, $langcode = NULL) {
   }
 
   /**
-   * 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 $this->stringTranslation->translate($string, $args, $options);
-  }
-
-  /**
    * Loads the given format pattern for the given langcode.
    *
    * @param string $format
diff --git a/core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php b/core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php
index 667bebe..4efa42b 100644
--- a/core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php
+++ b/core/lib/Drupal/Core/Plugin/ContextAwarePluginBase.php
@@ -11,7 +11,7 @@
 use Drupal\Component\Plugin\Exception\PluginException;
 use Drupal\Core\Plugin\Context\Context;
 use Drupal\Component\Plugin\Discovery\DiscoveryInterface;
-use Drupal\Core\StringTranslation\TranslationInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Drupal specific class for plugins that use context.
@@ -22,6 +22,8 @@
  */
 abstract class ContextAwarePluginBase extends ComponentContextAwarePluginBase {
 
+  use StringTranslationTrait;
+
   /**
    * Override of \Drupal\Component\Plugin\ContextAwarePluginBase::__construct().
    */
@@ -55,47 +57,4 @@ public function setContextValue($name, $value) {
     return $this;
   }
 
-  /**
-   * The translation manager service.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translationManager;
-
-  /**
-   * Translates a string to the current language or to a given language.
-   *
-   * See the t() documentation for details.
-   */
-  protected function t($string, array $args = array(), array $options = array()) {
-    return $this->translationManager()->translate($string, $args, $options);
-  }
-
-  /**
-   * Gets the translation manager.
-   *
-   * @return \Drupal\Core\StringTranslation\TranslationInterface
-   *   The translation manager.
-   */
-  protected function translationManager() {
-    if (!$this->translationManager) {
-      $this->translationManager = \Drupal::translation();
-    }
-    return $this->translationManager;
-  }
-
-  /**
-   * Sets the translation manager for this plugin.
-   *
-   * @param \Drupal\Core\StringTranslation\TranslationInterface $translation_manager
-   *   The translation manager.
-   *
-   * @return self
-   *   The plugin object.
-   */
-  public function setTranslationManager(TranslationInterface $translation_manager) {
-    $this->translationManager = $translation_manager;
-    return $this;
-  }
-
 }
diff --git a/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php b/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php
index 5b46054..6fa75b9 100644
--- a/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php
+++ b/core/lib/Drupal/Core/StringTranslation/StringTranslationTrait.php
@@ -29,6 +29,15 @@ protected function t($string, array $args = array(), array $options = array()) {
   }
 
   /**
+   * Formats a string containing a count of items.
+   *
+   * See the \Drupal\Core\StringTranslation::formatPlural() for details.
+   */
+  protected function formatPlural($count, $singular, $plural, array $args = array(), array $options = array()) {
+    return $this->getTranslationManager()->formatPlural($count, $singular, $plural, $args, $options);
+  }
+
+  /**
    * Gets the translation manager.
    *
    * @return \Drupal\Core\StringTranslation\TranslationInterface
diff --git a/core/modules/comment/lib/Drupal/comment/CommentManager.php b/core/modules/comment/lib/Drupal/comment/CommentManager.php
index 2102abe..3cec56f 100644
--- a/core/modules/comment/lib/Drupal/comment/CommentManager.php
+++ b/core/modules/comment/lib/Drupal/comment/CommentManager.php
@@ -13,6 +13,7 @@
 use Drupal\Core\Entity\EntityManagerInterface;
 use Drupal\Core\Routing\UrlGeneratorInterface;
 use Drupal\Core\Session\AccountInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\Core\StringTranslation\TranslationInterface;
 use Drupal\field\FieldInfo;
 
@@ -21,6 +22,8 @@
  */
 class CommentManager implements CommentManagerInterface {
 
+  use StringTranslationTrait;
+
   /**
    * The field info service.
    *
@@ -57,13 +60,6 @@ class CommentManager implements CommentManagerInterface {
   protected $userConfig;
 
   /**
-   * The string translation service.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translationManager;
-
-  /**
    * The url generator service.
    *
    * @var \Drupal\Core\Routing\UrlGeneratorInterface
@@ -294,13 +290,4 @@ public function forbiddenMessage(EntityInterface $entity, $field_name) {
     return '';
   }
 
-  /**
-   * 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/modules/config_translation/lib/Drupal/config_translation/FormElement/DateFormat.php b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/DateFormat.php
index 3cc9867..5bf650a 100644
--- a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/DateFormat.php
+++ b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/DateFormat.php
@@ -11,11 +11,14 @@
 use Drupal\Core\Ajax\AjaxResponse;
 use Drupal\Core\Ajax\ReplaceCommand;
 use Drupal\Core\Language\Language;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Defines the date format element for the configuration translation interface.
  */
-class DateFormat extends Element {
+class DateFormat implements ElementInterface {
+
+  use StringTranslationTrait;
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Element.php b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Element.php
deleted file mode 100644
index 40a43c2..0000000
--- a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Element.php
+++ /dev/null
@@ -1,44 +0,0 @@
-<?php
-
-/**
- * @file
- * Contains \Drupal\config_translation\FormElement\Element.
- */
-
-namespace Drupal\config_translation\FormElement;
-
-/**
- * Defines a base class for form elements.
- */
-abstract class Element implements ElementInterface {
-
-  /**
-   * The translation manager.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translationManager;
-
-  /**
-   * Translates a string to the current language or to a given language.
-   *
-   * See the t() documentation for details.
-   */
-  protected function t($string, array $args = array(), array $options = array()) {
-    return $this->translationManager()->translate($string, $args, $options);
-  }
-
-  /**
-   * Returns the translation manager.
-   *
-   * @return \Drupal\Core\StringTranslation\TranslationInterface
-   *   The translation manager.
-   */
-  protected function translationManager() {
-    if (!$this->translationManager) {
-      $this->translationManager = \Drupal::translation();
-    }
-    return $this->translationManager;
-  }
-
-}
diff --git a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textarea.php b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textarea.php
index e79107e..aa6b2e6 100644
--- a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textarea.php
+++ b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textarea.php
@@ -8,11 +8,14 @@
 namespace Drupal\config_translation\FormElement;
 
 use Drupal\Core\Language\Language;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Defines the textarea element for the configuration translation interface.
  */
-class Textarea extends Element {
+class Textarea implements ElementInterface {
+
+  use StringTranslationTrait;
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textfield.php b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textfield.php
index 1791961..ded36b1 100644
--- a/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textfield.php
+++ b/core/modules/config_translation/lib/Drupal/config_translation/FormElement/Textfield.php
@@ -8,11 +8,14 @@
 namespace Drupal\config_translation\FormElement;
 
 use Drupal\Core\Language\Language;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 
 /**
  * Defines the textfield element for the configuration translation interface.
  */
-class Textfield extends Element {
+class Textfield implements ElementInterface {
+
+  use StringTranslationTrait;
 
   /**
    * {@inheritdoc}
diff --git a/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php b/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php
index e80bd9d..7322daf 100644
--- a/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php
+++ b/core/modules/field_ui/lib/Drupal/field_ui/Plugin/Derivative/FieldUiLocalTask.php
@@ -11,6 +11,7 @@
 use Drupal\Component\Plugin\Derivative\DerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
 use Drupal\Core\Routing\RouteProviderInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\Core\StringTranslation\TranslationInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -19,6 +20,8 @@
  */
 class FieldUiLocalTask extends DerivativeBase implements ContainerDerivativeInterface {
 
+  use StringTranslationTrait;
+
   /**
    * The route provider.
    *
@@ -34,13 +37,6 @@ class FieldUiLocalTask extends DerivativeBase implements ContainerDerivativeInte
   protected $entityManager;
 
   /**
-   * The translation manager service.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translationManager;
-
-  /**
    * Creates an FieldUiLocalTask object.
    *
    * @param \Drupal\Core\Routing\RouteProviderInterface $route_provider
@@ -194,13 +190,4 @@ public function alterLocalTasks(&$local_tasks) {
     }
   }
 
-  /**
-   * 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/modules/migrate/lib/Drupal/migrate/MigrateExecutable.php b/core/modules/migrate/lib/Drupal/migrate/MigrateExecutable.php
index 104f187..7ac3187 100644
--- a/core/modules/migrate/lib/Drupal/migrate/MigrateExecutable.php
+++ b/core/modules/migrate/lib/Drupal/migrate/MigrateExecutable.php
@@ -8,6 +8,7 @@
 namespace Drupal\migrate;
 
 use Drupal\Core\Utility\Error;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\migrate\Entity\MigrationInterface;
 use Drupal\migrate\Plugin\MigrateIdMapInterface;
 
@@ -16,6 +17,8 @@
  */
 class MigrateExecutable {
 
+  use StringTranslationTrait;
+
   /**
    * The configuration of the migration to do.
    *
@@ -106,13 +109,6 @@ class MigrateExecutable {
   protected $memoryLimit;
 
   /**
-   * The translation manager.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translationManager;
-
-  /**
    * The rollback action to be saved for the current row.
    *
    * @var int
@@ -602,26 +598,4 @@ public function handleException(\Exception $exception, $save = TRUE) {
     $this->message->display($message);
   }
 
-  /**
-   * 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, $options);
-  }
-
-  /**
-   * Gets the translation manager.
-   *
-   * @return \Drupal\Core\StringTranslation\TranslationInterface
-   *   The translation manager.
-   */
-  protected function translationManager() {
-    if (!$this->translationManager) {
-      $this->translationManager = \Drupal::translation();
-    }
-    return $this->translationManager;
-  }
-
 }
diff --git a/core/modules/system/lib/Drupal/system/Controller/SystemController.php b/core/modules/system/lib/Drupal/system/Controller/SystemController.php
index 5f55d6e..d5c3617 100644
--- a/core/modules/system/lib/Drupal/system/Controller/SystemController.php
+++ b/core/modules/system/lib/Drupal/system/Controller/SystemController.php
@@ -301,10 +301,10 @@ public function themesPage() {
 
     // There are two possible theme groups.
     $theme_group_titles = array(
-      'enabled' => $this->translationManager()->formatPlural(count($theme_groups['enabled']), 'Enabled theme', 'Enabled themes'),
+      'enabled' => $this->formatPlural(count($theme_groups['enabled']), 'Enabled theme', 'Enabled themes'),
     );
     if (!empty($theme_groups['disabled'])) {
-      $theme_group_titles['disabled'] = $this->translationManager()->formatPlural(count($theme_groups['disabled']), 'Disabled theme', 'Disabled themes');
+      $theme_group_titles['disabled'] = $this->formatPlural(count($theme_groups['disabled']), 'Disabled theme', 'Disabled themes');
     }
 
     uasort($theme_groups['enabled'], 'system_sort_themes');
diff --git a/core/modules/system/lib/Drupal/system/Plugin/views/field/BulkForm.php b/core/modules/system/lib/Drupal/system/Plugin/views/field/BulkForm.php
index ad784e3..66ce4bb 100644
--- a/core/modules/system/lib/Drupal/system/Plugin/views/field/BulkForm.php
+++ b/core/modules/system/lib/Drupal/system/Plugin/views/field/BulkForm.php
@@ -269,7 +269,7 @@ public function viewsFormSubmit(&$form, &$form_state) {
       $count = count(array_filter($form_state['values'][$this->options['id']]));
       $action = $this->actions[$form_state['values']['action']];
       if ($count) {
-        drupal_set_message($this->translationManager()->formatPlural($count, '%action was applied to @count item.', '%action was applied to @count items.', array(
+        drupal_set_message($this->formatPlural($count, '%action was applied to @count item.', '%action was applied to @count items.', array(
           '%action' => $action->label(),
         )));
       }
diff --git a/core/modules/update/lib/Drupal/update/UpdateManager.php b/core/modules/update/lib/Drupal/update/UpdateManager.php
index 2139fdc..daa7816 100644
--- a/core/modules/update/lib/Drupal/update/UpdateManager.php
+++ b/core/modules/update/lib/Drupal/update/UpdateManager.php
@@ -10,6 +10,7 @@
 use Drupal\Core\Extension\ModuleHandlerInterface;
 use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
 use Drupal\Core\StringTranslation\TranslationInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\Core\Utility\ProjectInfo;
 
 /**
@@ -17,6 +18,8 @@
  */
 class UpdateManager implements UpdateManagerInterface {
 
+  use StringTranslationTrait;
+
   /**
    * The update settings
    *
@@ -60,13 +63,6 @@ class UpdateManager implements UpdateManagerInterface {
   protected $availableReleasesTempStore;
 
   /**
-   * The translation service.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translation;
-
-  /**
    * Constructs a UpdateManager.
    *
    * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
@@ -84,7 +80,7 @@ public function __construct(ConfigFactoryInterface $config_factory, ModuleHandle
     $this->updateSettings = $config_factory->get('update.settings');
     $this->moduleHandler = $module_handler;
     $this->updateProcessor = $update_processor;
-    $this->translation = $translation;
+    $this->translationManager = $translation;
     $this->keyValueStore = $key_value_expirable_factory->get('update');
     $this->availableReleasesTempStore = $key_value_expirable_factory->get('update_available_releases');
     $this->projects = array();
@@ -215,13 +211,4 @@ public function fetchDataBatch(&$context) {
     }
   }
 
-  /**
-   * 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 $this->translation->translate($string, $args, $options);
-  }
-
 }
diff --git a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsEntityArgumentValidator.php b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsEntityArgumentValidator.php
index eb2f383..5c17ee2 100644
--- a/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsEntityArgumentValidator.php
+++ b/core/modules/views/lib/Drupal/views/Plugin/Derivative/ViewsEntityArgumentValidator.php
@@ -10,6 +10,7 @@
 use Drupal\Component\Plugin\Derivative\DerivativeBase;
 use Drupal\Core\Plugin\Discovery\ContainerDerivativeInterface;
 use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\StringTranslation\StringTranslationTrait;
 use Drupal\Core\StringTranslation\TranslationInterface;
 use Symfony\Component\DependencyInjection\ContainerInterface;
 
@@ -21,6 +22,9 @@
  * @see \Drupal\views\Plugin\views\argument_validator\Entity
  */
 class ViewsEntityArgumentValidator extends DerivativeBase implements ContainerDerivativeInterface {
+
+  use StringTranslationTrait;
+
   /**
    * The base plugin ID this derivative is for.
    *
@@ -36,13 +40,6 @@ class ViewsEntityArgumentValidator extends DerivativeBase implements ContainerDe
   protected $entityManager;
 
   /**
-   * The string translation.
-   *
-   * @var \Drupal\Core\StringTranslation\TranslationInterface
-   */
-  protected $translationManager;
-
-  /**
    * List of derivative definitions.
    *
    * @var array
@@ -96,13 +93,4 @@ public function getDerivativeDefinitions(array $base_plugin_definition) {
     return $this->derivatives;
   }
 
-  /**
-   * 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);
-  }
-
 }