diff --git a/core/lib/Drupal/Core/Entity/DatabaseStorageController.php b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
index b07a0e9..94545c7 100644
--- a/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
+++ b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
@@ -574,6 +574,9 @@ protected function doLoadFieldItems($entities, $age) {
     foreach ($fields as $field_name => $field) {
       $table = $load_current ? static::_fieldTableName($field) : static::_fieldRevisionTableName($field);
 
+      // If the field is translatable ensure that only values having valid
+      // languages are retrieved. Since we are loading values for multiple
+      // entities, we cannot limit the query to the available translations.
       $langcodes = $field['translatable'] ? $all_langcodes : array(Language::LANGCODE_NOT_SPECIFIED);
       $results = $this->database->select($table, 't')
         ->fields('t')