diff --git a/core/lib/Drupal/Core/StringTranslation/TranslationManager.php b/core/lib/Drupal/Core/StringTranslation/TranslationManager.php
index 872d57f631d0..e7c58d82cc51 100644
--- a/core/lib/Drupal/Core/StringTranslation/TranslationManager.php
+++ b/core/lib/Drupal/Core/StringTranslation/TranslationManager.php
@@ -16,20 +16,24 @@ use Drupal\Core\StringTranslation\Translator\TranslatorInterface;
 class TranslationManager implements TranslationInterface, TranslatorInterface {
 
   /**
-   * An array of active translators keyed by priority.
+   * An unsorted array of arrays of active translators.
    *
-   * @var array
-   *   Array of \Drupal\Core\StringTranslation\Translator\TranslatorInterface objects
+   * An associative array. The keys are integers that indicate priority. Values
+   * are arrays of TranslatorInterface objects.
+   *
+   * @var \Drupal\Core\StringTranslation\Translator\TranslatorInterface[][]
+   *
+   * @see \Drupal\Core\StringTranslation\TranslationManager::addTranslator()
+   * @see \Drupal\Core\StringTranslation\TranslationManager::sortTranslators()
    */
   protected $translators = array();
 
   /**
-   * Holds the array of translators sorted by priority.
+   * An array of translators, sorted by priority.
    *
    * If this is NULL a rebuild will be triggered.
    *
-   * @var array
-   *   An array of path processor objects.
+   * @var null|\Drupal\Core\StringTranslation\Translator\TranslatorInterface[]
    *
    * @see \Drupal\Core\StringTranslation\TranslationManager::addTranslator()
    * @see \Drupal\Core\StringTranslation\TranslationManager::sortTranslators()
@@ -62,8 +66,7 @@ class TranslationManager implements TranslationInterface, TranslatorInterface {
    * @param int $priority
    *   The priority of the logger being added.
    *
-   * @return \Drupal\Core\StringTranslation\TranslationManager
-   *   The called object.
+   * @return $this
    */
   public function addTranslator(TranslatorInterface $translator, $priority = 0) {
     $this->translators[$priority][] = $translator;
@@ -75,8 +78,8 @@ class TranslationManager implements TranslationInterface, TranslatorInterface {
   /**
    * Sorts translators according to priority.
    *
-   * @return array
-   *   A sorted array of translators objects.
+   * @return \Drupal\Core\StringTranslation\Translator\TranslatorInterface[]
+   *   A sorted array of translator objects.
    */
   protected function sortTranslators() {
     $sorted = array();