diff --git a/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php b/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php
index 9c2c893..07f7c48 100644
--- a/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityDefinitionUpdateManager.php
@@ -107,13 +107,6 @@ public function getChangeSummary() {
    */
   public function applyUpdates() {
     foreach ($this->getChangeList() as $entity_type_id => $change_list) {
-      // Process entity type definition changes.
-      if (!empty($change_list['entity_type']) && $change_list['entity_type'] == static::DEFINITION_UPDATED) {
-        $entity_type = $this->entityManager->getDefinition($entity_type_id);
-        $original = $this->entityManager->getLastInstalledDefinition($entity_type_id);
-        $this->entityManager->onEntityTypeUpdate($entity_type, $original);
-      }
-
       // Process field storage definition changes.
       if (!empty($change_list['field_storage_definitions'])) {
         $storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
@@ -134,6 +127,16 @@ public function applyUpdates() {
               break;
           }
         }
+
+        // Process entity type definition changes after storage definitions
+        // ones, as in some conditions a change in the field storage definition
+        // can also be detected as an entity type definition change. This avoids
+        // the change to be applied twice (resulting in an unrecoverable error).
+        if (!empty($change_list['entity_type']) && $change_list['entity_type'] == static::DEFINITION_UPDATED) {
+          $entity_type = $this->entityManager->getDefinition($entity_type_id);
+          $original = $this->entityManager->getLastInstalledDefinition($entity_type_id);
+          $this->entityManager->onEntityTypeUpdate($entity_type, $original);
+        }
       }
     }
   }
@@ -171,7 +174,7 @@ protected function getChangeList() {
         $change_list[$entity_type_id]['entity_type'] = static::DEFINITION_UPDATED;
       }
 
-      if ($entity_type->isFieldable()) {
+      if (is_subclass_of($entity_type->getClass(), '\Drupal\Core\Entity\ContentEntityInterface')) {
         $field_changes = array();
         $storage_definitions = $this->entityManager->getFieldStorageDefinitions($entity_type_id);
         $original_storage_definitions = $this->entityManager->getLastInstalledFieldStorageDefinitions($entity_type_id);
diff --git a/core/lib/Drupal/Core/Entity/EntityManager.php b/core/lib/Drupal/Core/Entity/EntityManager.php
index 94fe169..6af2350 100644
--- a/core/lib/Drupal/Core/Entity/EntityManager.php
+++ b/core/lib/Drupal/Core/Entity/EntityManager.php
@@ -987,7 +987,7 @@ public function onEntityTypeCreate(EntityTypeInterface $entity_type) {
     }
 
     $this->setLastInstalledDefinition($entity_type);
-    if ($entity_type->isFieldable()) {
+    if (is_subclass_of($entity_type->getClass(), '\Drupal\Core\Entity\ContentEntityInterface')) {
       $this->setLastInstalledFieldStorageDefinitions($entity_type_id, $this->getFieldStorageDefinitions($entity_type_id));
     }
   }
diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
index de6910f..6a48e09 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
@@ -1100,7 +1100,13 @@ protected function createSharedTableSchema(FieldStorageDefinitionInterface $stor
           $schema[$table_name] = $this->getSharedTableFieldSchema($storage_definition, $table_name, $column_names);
           if (!$only_save) {
             foreach ($schema[$table_name]['fields'] as $name => $specifier) {
-              $schema_handler->addField($table_name, $name, $specifier);
+              try {
+                $schema_handler->addField($table_name, $name, $specifier);
+              }
+              catch (\Exception $e) {
+                // FIXME
+                watchdog_exception('php', $e);
+              }
             }
             if (!empty($schema[$table_name]['indexes'])) {
               foreach ($schema[$table_name]['indexes'] as $name => $specifier) {
diff --git a/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php b/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php
index aec6f69..a97348d 100644
--- a/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php
+++ b/core/modules/block_content/src/Tests/BlockContentTranslationUITest.php
@@ -143,9 +143,8 @@ public function testDisabledBundle() {
 
     // Make sure that only a single row was inserted into the
     // {content_translation} table.
-    $rows = db_query('SELECT * FROM {content_translation}')->fetchAll();
+    $rows = db_query('SELECT * FROM {block_content_field_data} WHERE id = :id', array(':id' => $enabled_block_content->id()))->fetchAll();
     $this->assertEqual(1, count($rows));
-    $this->assertEqual($enabled_block_content->id(), reset($rows)->entity_id);
   }
 
 }
diff --git a/core/modules/content_translation/content_translation.admin.inc b/core/modules/content_translation/content_translation.admin.inc
index 92b75bf..7ea3a80 100644
--- a/core/modules/content_translation/content_translation.admin.inc
+++ b/core/modules/content_translation/content_translation.admin.inc
@@ -97,7 +97,8 @@ function _content_translation_form_language_content_settings_form_alter(array &$
       if ($fields) {
         foreach ($fields as $field_name => $definition) {
           // Allow to configure only fields supporting multilingual storage.
-          if (!empty($storage_definitions[$field_name]) && $storage_definitions[$field_name]->isTranslatable()) {
+          // We skip our own fields as they are always translatable.
+          if (!empty($storage_definitions[$field_name]) && $storage_definitions[$field_name]->isTranslatable() && $storage_definitions[$field_name]->getProvider() != 'content_translation') {
             $form['settings'][$entity_type_id][$bundle]['fields'][$field_name] = array(
               '#label' => $definition->getLabel(),
               '#type' => 'checkbox',
@@ -339,5 +340,13 @@ function content_translation_form_language_content_settings_submit(array $form,
   \Drupal::entityManager()->clearCachedDefinitions();
   \Drupal::service('router.builder')->setRebuildNeeded();
 
+  // Handle field definition creation if needed.
+  /** @var \Drupal\Core\Entity\EntityDefinitionUpdateManagerInterface $definition_manager */
+  $definition_manager = \Drupal::service('entity.definition_update_manager');
+  if ($definition_manager->needsUpdates()) {
+    $url = \Drupal::urlGenerator()->generate('system.status');
+    drupal_set_message(t('The site has pending updates, visit the <a href="!url">status report</a> page for more details.', array('!url' => $url)), 'warning');
+  }
+
   drupal_set_message(t('Settings successfully updated.'));
 }
diff --git a/core/modules/content_translation/content_translation.install b/core/modules/content_translation/content_translation.install
index 4aa7e73..2d52325 100644
--- a/core/modules/content_translation/content_translation.install
+++ b/core/modules/content_translation/content_translation.install
@@ -5,82 +5,10 @@
  * Installation functions for Content Translation module.
  */
 
-use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationUrl;
 
 /**
- * Implements hook_schema().
- */
-function content_translation_schema() {
-  $schema['content_translation'] = array(
-    'description' => 'Table to track content translations',
-    'fields' => array(
-      'entity_type' => array(
-        'type' => 'varchar',
-        'length' => EntityTypeInterface::ID_MAX_LENGTH,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'The entity type this translation relates to',
-      ),
-      'entity_id' => array(
-        'type' => 'varchar',
-        'length' => 128,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'The entity id this translation relates to',
-      ),
-      'langcode' => array(
-        'type' => 'varchar',
-        'length' => 32,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'The target language for this translation.',
-      ),
-      'source' => array(
-        'type' => 'varchar',
-        'length' => 32,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'The source language from which this translation was created.',
-      ),
-      'outdated' => array(
-        'description' => 'A boolean indicating whether this translation needs to be updated.',
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-      'uid' => array(
-        'description' => 'The author of this translation.',
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-      'status' => array(
-        'description' => 'Boolean indicating whether the translation is visible to non-translators.',
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 1,
-      ),
-      'created' => array(
-        'description' => 'The Unix timestamp when the translation was created.',
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-      'changed' => array(
-        'description' => 'The Unix timestamp when the translation was most recently saved.',
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 0,
-      ),
-    ),
-    'primary key' => array('entity_type', 'entity_id', 'langcode'),
-  );
-  return $schema;
-}
-
-/**
  * Implements hook_install().
  */
 function content_translation_install() {
diff --git a/core/modules/content_translation/content_translation.module b/core/modules/content_translation/content_translation.module
index 1119ab8..cec2931 100644
--- a/core/modules/content_translation/content_translation.module
+++ b/core/modules/content_translation/content_translation.module
@@ -9,6 +9,7 @@
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Entity\EntityFormInterface;
 use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Routing\RouteMatchInterface;
@@ -91,6 +92,16 @@ function content_translation_language_types_info_alter(array &$language_types) {
  * will be assumed. Every translation handler must implement
  * \Drupal\content_translation\ContentTranslationHandlerInterface.
  *
+ * To implement its business logic the content translation UI relies on various
+ * metadata items describing the translation state. The default implementation
+ * is provided by \Drupal\content_translation\ContentTranslationMetadata, which
+ * defines one field for each metadata item. Entity types needing to customize
+ * this behavior can specify an alternative class through the
+ * 'content_translation_metadata' key in the 'handlers' entity type definition
+ * property. See \Drupal\node\NodeTranslationMetadata for an example. Every
+ * content translation metadata handler needs to implement
+ * \Drupal\content_translation\ContentTranslationMetadataInterface.
+ *
  * If the entity paths match the default pattern above and there is no need for
  * an entity-specific translation handler, Content Translation will
  * provide built-in support for the entity. However enabling translation for
@@ -106,6 +117,9 @@ function content_translation_entity_type_alter(array &$entity_types) {
       if (!$entity_type->hasHandlerClass('translation')) {
         $entity_type->setHandlerClass('translation', 'Drupal\content_translation\ContentTranslationHandler');
       }
+      if (!$entity_type->hasHandlerClass('content_translation_metadata')) {
+        $entity_type->setHandlerClass('content_translation_metadata', 'Drupal\content_translation\ContentTranslationMetadata');
+      }
 
       $translation = $entity_type->get('translation');
       if (!$translation || !isset($translation['content_translation'])) {
@@ -141,6 +155,19 @@ function content_translation_entity_bundle_info_alter(&$bundles) {
 }
 
 /**
+ * Implements hook_entity_base_field_info().
+ */
+function content_translation_entity_base_field_info(EntityTypeInterface $entity_type) {
+  $definitions = array();
+  if (content_translation_enabled($entity_type->id())) {
+    /** @var \Drupal\content_translation\ContentTranslationManagerInterface $manager */
+    $manager = \Drupal::service('content_translation.manager');
+    $definitions = $manager->getEntityTypeTranslationMetadata($entity_type)->getFieldDefinitions();
+  }
+  return $definitions;
+}
+
+/**
  * Implements hook_field_info_alter().
  *
  * Content translation extends the @FieldType annotation with following key:
@@ -332,10 +359,7 @@ function content_translation_enabled($entity_type, $bundle = NULL) {
  * @todo Move to \Drupal\content_translation\ContentTranslationManager.
  */
 function content_translation_controller($entity_type_id) {
-  $entity_type = \Drupal::entityManager()->getDefinition($entity_type_id);
-  // @todo Throw an exception if the key is missing.
-  $class = $entity_type->getHandlerClass('translation');
-  return new $class($entity_type);
+  return \Drupal::entityManager()->getHandler($entity_type_id, 'translation');
 }
 
 /**
@@ -400,58 +424,16 @@ function content_translation_language_fallback_candidates_entity_view_alter(&$ca
   /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
   $entity = $context['data'];
   $entity_type_id = $entity->getEntityTypeId();
-  $entity_type = $entity->getEntityType();
-  $permission = $entity_type->getPermissionGranularity() == 'bundle' ? $permission = "translate {$entity->bundle()} $entity_type_id" : "translate $entity_type_id";
-  $current_user = \Drupal::currentuser();
-  if (!$current_user->hasPermission('translate any entity') && !$current_user->hasPermission($permission)) {
-    foreach ($entity->getTranslationLanguages() as $langcode => $language) {
-      if (empty($entity->translation[$langcode]['status'])) {
-        unset($candidates[$langcode]);
-      }
-    }
-  }
-}
-
-/**
- * Implements hook_entity_storage_load().
- */
-function content_translation_entity_storage_load(array $entities, $entity_type) {
-  $enabled_entities = array();
-
-  if (content_translation_enabled($entity_type)) {
-    foreach ($entities as $entity) {
-      if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
-        $enabled_entities[$entity->id()] = $entity;
-      }
-    }
-  }
-
-  if (!empty($enabled_entities)) {
-    content_translation_load_translation_metadata($enabled_entities, $entity_type);
-  }
-}
-
-/**
- * Loads translation data into the given entities.
- *
- * @param array $entities
- *   The entities keyed by entity ID.
- * @param string $entity_type
- *   The type of the entities.
- */
-function content_translation_load_translation_metadata(array $entities, $entity_type) {
-  $query = 'SELECT * FROM {content_translation} te WHERE te.entity_type = :entity_type AND te.entity_id IN (:entity_id)';
-  $result = db_query($query, array(':entity_type' => $entity_type, ':entity_id' => array_keys($entities)));
-  $exclude = array('entity_type', 'entity_id', 'langcode');
-  foreach ($result as $record) {
-    $entity = $entities[$record->entity_id];
-    // @todo Declare these as entity (translation?) properties.
-    foreach ($record as $field_name => $value) {
-      if (!in_array($field_name, $exclude)) {
-        $langcode = $record->langcode;
-        $entity->translation[$langcode][$field_name] = $value;
-        if (!$entity->hasTranslation($langcode)) {
-          $entity->initTranslation($langcode);
+  if (content_translation_enabled($entity_type_id, $entity->bundle())) {
+    $entity_type = $entity->getEntityType();
+    $permission = $entity_type->getPermissionGranularity() == 'bundle' ? $permission = "translate {$entity->bundle()} $entity_type_id" : "translate $entity_type_id";
+    $current_user = \Drupal::currentuser();
+    if (!$current_user->hasPermission('translate any entity') && !$current_user->hasPermission($permission)) {
+      /** @var \Drupal\content_translation\ContentTranslationManagerInterface $manager */
+      $manager = \Drupal::service('content_translation.manager');
+      foreach ($entity->getTranslationLanguages() as $langcode => $language) {
+        if ($manager->getTranslationMetadata($entity->getTranslation($langcode))->isPublished()) {
+          unset($candidates[$langcode]);
         }
       }
     }
@@ -459,75 +441,6 @@ function content_translation_load_translation_metadata(array $entities, $entity_
 }
 
 /**
- * Implements hook_entity_insert().
- */
-function content_translation_entity_insert(EntityInterface $entity) {
-  // Only do something if translation support for the given entity is enabled.
-  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
-    return;
-  }
-
-  $fields = array('entity_type', 'entity_id', 'langcode', 'source', 'outdated', 'uid', 'status', 'created', 'changed');
-  $query = db_insert('content_translation')->fields($fields);
-
-  foreach ($entity->getTranslationLanguages() as $langcode => $language) {
-    $translation = isset($entity->translation[$langcode]) ? $entity->translation[$langcode] : array();
-
-    $translation += array(
-      'source' => '',
-      'uid' => \Drupal::currentUser()->id(),
-      'outdated' => FALSE,
-      'status' => TRUE,
-      'created' => REQUEST_TIME,
-      'changed' => REQUEST_TIME,
-    );
-
-    $translation['entity_type'] = $entity->getEntityTypeId();
-    $translation['entity_id'] = $entity->id();
-    $translation['langcode'] = $langcode;
-
-    // Reorder values to match the schema.
-    $values = array();
-    foreach ($fields as $field_name) {
-      $value = is_bool($translation[$field_name]) ? intval($translation[$field_name]) : $translation[$field_name];
-      $values[$field_name] = $value;
-    }
-    $query->values($values);
-  }
-
-  $query->execute();
-}
-
-/**
- * Implements hook_entity_delete().
- */
-function content_translation_entity_delete(EntityInterface $entity) {
-  // Only do something if translation support for the given entity is enabled.
-  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
-    return;
-  }
-
-  db_delete('content_translation')
-    ->condition('entity_type', $entity->getEntityTypeId())
-    ->condition('entity_id', $entity->id())
-    ->execute();
-}
-
-/**
- * Implements hook_entity_update().
- */
-function content_translation_entity_update(EntityInterface $entity) {
-  // Only do something if translation support for the given entity is enabled.
-  if (!($entity instanceof ContentEntityInterface) || !$entity->isTranslatable()) {
-    return;
-  }
-
-  // Delete and create to ensure no stale value remains behind.
-  content_translation_entity_delete($entity);
-  content_translation_entity_insert($entity);
-}
-
-/**
  * Implements hook_entity_extra_field_info().
  */
 function content_translation_entity_extra_field_info() {
@@ -588,11 +501,18 @@ function content_translation_form_field_ui_field_edit_form_alter(array &$form, F
  * Implements hook_entity_presave().
  */
 function content_translation_entity_presave(EntityInterface $entity) {
-  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable()) {
-    // @todo Avoid using request attributes once translation metadata become
-    //   regular fields.
-    $attributes = \Drupal::request()->attributes;
-    \Drupal::service('content_translation.synchronizer')->synchronizeFields($entity, $entity->language()->id, $attributes->get('source_langcode'));
+  if ($entity instanceof ContentEntityInterface && $entity->isTranslatable() && !$entity->isNew()) {
+    // If we are creating a new translation we need to use the source language
+    // as original language, since source values are the only ones available to
+    // compare against.
+    if (!isset($entity->original)) {
+      $entity->original = entity_load_unchanged($entity->entityType(), $entity->id());
+    }
+    $langcode = $entity->language()->id;
+    /** @var \Drupal\content_translation\ContentTranslationManagerInterface $manager */
+    $manager = \Drupal::service('content_translation.manager');
+    $source_langcode = !$entity->original->hasTranslation($langcode) ? $manager->getTranslationMetadata($entity)->getSource() : NULL;
+    \Drupal::service('content_translation.synchronizer')->synchronizeFields($entity, $langcode, $source_langcode);
   }
 }
 
diff --git a/core/modules/content_translation/src/ContentTranslationHandler.php b/core/modules/content_translation/src/ContentTranslationHandler.php
index b619036..5d4c926 100644
--- a/core/modules/content_translation/src/ContentTranslationHandler.php
+++ b/core/modules/content_translation/src/ContentTranslationHandler.php
@@ -13,6 +13,7 @@
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Render\Element;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 
 /**
  * Base class for content translation handlers.
@@ -36,14 +37,49 @@ class ContentTranslationHandler implements ContentTranslationHandlerInterface {
   protected $entityType;
 
   /**
+   * A content translation metadata handler instance.
+   *
+   * @var \Drupal\content_translation\ContentTranslationMetadataInterface
+   */
+  protected $metadata;
+
+  /**
    * Initializes an instance of the content translation controller.
    *
    * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
    *   The info array of the given entity type.
+   * @param \Drupal\content_translation\ContentTranslationManagerInterface $manager
+   *   The content translation manager service.
    */
-  public function __construct(EntityTypeInterface $entity_type) {
+  public function __construct(EntityTypeInterface $entity_type, ContentTranslationManagerInterface $manager) {
     $this->entityTypeId = $entity_type->id();
     $this->entityType = $entity_type;
+    $this->metadata = $manager->getEntityTypeTranslationMetadata($entity_type);
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function createInstance(ContainerInterface $container, EntityTypeInterface $entity_type) {
+    return new static($entity_type, $container->get('content_translation.manager'));
+  }
+
+  /**
+   * Returns the translation metadata for the specified translation.
+   *
+   * @param EntityInterface $translation
+   *   The entity translation.
+   *
+   * @return ContentTranslationMetadataInterface
+   *   The translation metadata.
+   */
+  protected function getMetadata(EntityInterface $translation) {
+    // We need this metadata factory method to avoid storing the translation
+    // manager in the local state, as this would cause the DIC to be serialized
+    // as part of the entity manager state.
+    $metadata = clone $this->metadata;
+    $metadata->setTranslation($translation);
+    return $metadata;
   }
 
   /**
@@ -51,9 +87,9 @@ public function __construct(EntityTypeInterface $entity_type) {
    */
   public function retranslate(EntityInterface $entity, $langcode = NULL) {
     $updated_langcode = !empty($langcode) ? $langcode : $entity->language()->id;
-    $translations = $entity->getTranslationLanguages();
-    foreach ($translations as $langcode => $language) {
-      $entity->translation[$langcode]['outdated'] = $langcode != $updated_langcode;
+    foreach ($entity->getTranslationLanguages() as $langcode => $language) {
+      $this->getMetadata($entity->getTranslation($langcode))
+        ->setOutdated($langcode != $updated_langcode);
     }
   }
 
@@ -197,20 +233,16 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
       );
 
       // A new translation is enabled by default.
-      $status = $new_translation || $entity->translation[$form_langcode]['status'];
+      $metadata = $this->getMetadata($entity);
+      $status = $new_translation || $metadata->isPublished();
       // If there is only one published translation we cannot unpublish it,
       // since there would be nothing left to display.
       $enabled = TRUE;
       if ($status) {
-        // A new translation is not available in the translation metadata, hence
-        // it should count as one more.
-        $published = $new_translation;
-        // When creating a brand new translation, $entity->translation is not
-        // set.
-        if (!$new_translation) {
-          foreach ($entity->translation as $translation) {
-            $published += $translation['status'];
-          }
+        $published = 0;
+        foreach ($entity->getTranslationLanguages() as $langcode => $language) {
+          $published += $this->getMetadata($entity->getTranslation($langcode))
+            ->isPublished();
         }
         $enabled = $published > 1;
       }
@@ -226,7 +258,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
         '#disabled' => !$enabled,
       );
 
-      $translate = !$new_translation && $entity->translation[$form_langcode]['outdated'];
+      $translate = !$new_translation && $metadata->isOutdated();
       if (!$translate) {
         $form['content_translation']['retranslate'] = array(
           '#type' => 'checkbox',
@@ -249,8 +281,8 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
       if ($new_translation) {
         $name = \Drupal::currentUser()->getUsername();
       }
-      elseif ($entity->translation[$form_langcode]['uid']) {
-        $name = user_load($entity->translation[$form_langcode]['uid'])->getUsername();
+      elseif ($metadata->getAuthor()->id()) {
+        $name = $metadata->getAuthor()->getUsername();
       }
       $form['content_translation']['name'] = array(
         '#type' => 'textfield',
@@ -261,7 +293,7 @@ public function entityFormAlter(array &$form, FormStateInterface $form_state, En
         '#description' => t('Leave blank for %anonymous.', array('%anonymous' => \Drupal::config('user.settings')->get('anonymous'))),
       );
 
-      $date = $new_translation ? REQUEST_TIME : $entity->translation[$form_langcode]['created'];
+      $date = $new_translation ? REQUEST_TIME : $metadata->getCreatedTime();
       $form['content_translation']['created'] = array(
         '#type' => 'textfield',
         '#title' => t('Authored on'),
@@ -383,35 +415,23 @@ protected function addTranslatabilityClue(&$element) {
   public function entityFormEntityBuild($entity_type, EntityInterface $entity, array $form, FormStateInterface $form_state) {
     $form_object = $form_state->getFormObject();
     $form_langcode = $form_object->getFormLangcode($form_state);
-
-    if (!isset($entity->translation[$form_langcode])) {
-      $entity->translation[$form_langcode] = array();
-    }
     $values = $form_state->getValue('content_translation', array());
-    $translation = &$entity->translation[$form_langcode];
 
-    // @todo Use the entity setter when all entities support multilingual
-    // properties.
-    $translation['uid'] = !empty($values['name']) && ($account = user_load_by_name($values['name'])) ? $account->id() : 0;
-    $translation['status'] = !empty($values['status']);
-    $translation['created'] = !empty($values['created']) ? strtotime($values['created']) : REQUEST_TIME;
-    $translation['changed'] = REQUEST_TIME;
+    $metadata = $this->getMetadata($entity);
+    $metadata->setAuthorId(!empty($values['name']) && ($account = user_load_by_name($values['name'])) ? $account->id() : 0);
+    $metadata->setPublished(!empty($values['status']));
+    $metadata->setCreatedTime(!empty($values['created']) ? strtotime($values['created']) : REQUEST_TIME);
+    $metadata->setChangedTime(REQUEST_TIME);
 
     $source_langcode = $this->getSourceLangcode($form_state);
     if ($source_langcode) {
-      $translation['source'] = $source_langcode;
+      $metadata->setSource($source_langcode);
     }
 
-    $translation['outdated'] = !empty($values['outdated']);
+    $metadata->setOutdated(!empty($values['outdated']));
     if (!empty($values['retranslate'])) {
       $this->retranslate($entity, $form_langcode);
     }
-
-    // Set contextual information that can be reused during the storage phase.
-    // @todo Remove this once translation metadata are converted to regular
-    //   fields.
-    $attributes = \Drupal::request()->attributes;
-    $attributes->set('source_langcode', $source_langcode);
   }
 
   /**
diff --git a/core/modules/content_translation/src/ContentTranslationHandlerInterface.php b/core/modules/content_translation/src/ContentTranslationHandlerInterface.php
index 5ab8858..e42dbdf 100644
--- a/core/modules/content_translation/src/ContentTranslationHandlerInterface.php
+++ b/core/modules/content_translation/src/ContentTranslationHandlerInterface.php
@@ -7,6 +7,7 @@
 
 namespace Drupal\content_translation;
 
+use Drupal\Core\Entity\EntityHandlerInterface;
 use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Form\FormStateInterface;
 
@@ -16,7 +17,7 @@
  * Defines a set of methods to allow any entity to be processed by the entity
  * translation UI.
  */
-interface ContentTranslationHandlerInterface {
+interface ContentTranslationHandlerInterface extends EntityHandlerInterface {
 
   /**
    * Checks if the user can perform the given operation on translations of the
diff --git a/core/modules/content_translation/src/ContentTranslationManager.php b/core/modules/content_translation/src/ContentTranslationManager.php
index 817d3f8..b5d108c 100644
--- a/core/modules/content_translation/src/ContentTranslationManager.php
+++ b/core/modules/content_translation/src/ContentTranslationManager.php
@@ -7,7 +7,9 @@
 
 namespace Drupal\content_translation;
 
+use Drupal\Core\Entity\EntityInterface;
 use Drupal\Core\Entity\EntityManagerInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
 
 /**
  * Provides common functionality for content translation.
@@ -34,6 +36,23 @@ public function __construct(EntityManagerInterface $manager) {
   /**
    * {@inheritdoc}
    */
+  public function getEntityTypeTranslationMetadata(EntityTypeInterface $entity_type) {
+    return $this->entityManager->getHandler($entity_type->id(), 'content_translation_metadata');
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getTranslationMetadata(EntityInterface $translation) {
+    // We need a new instance of the metadata handler wrapping each translation.
+    $metadata = clone $this->getEntityTypeTranslationMetadata($translation->getEntityType());
+    $metadata->setTranslation($translation);
+    return $metadata;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
   public function isSupported($entity_type_id) {
     $entity_type = $this->entityManager->getDefinition($entity_type_id);
     return $entity_type->isTranslatable() && $entity_type->hasLinkTemplate('drupal:content-translation-overview');
diff --git a/core/modules/content_translation/src/ContentTranslationManagerInterface.php b/core/modules/content_translation/src/ContentTranslationManagerInterface.php
index 8591138..a2951ed 100644
--- a/core/modules/content_translation/src/ContentTranslationManagerInterface.php
+++ b/core/modules/content_translation/src/ContentTranslationManagerInterface.php
@@ -7,6 +7,9 @@
 
 namespace Drupal\content_translation;
 
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+
 /**
  * Provides an interface for common functionality for content translation.
  */
@@ -31,4 +34,26 @@ public function getSupportedEntityTypes();
    */
   public function isSupported($entity_type_id);
 
+  /**
+   * Content translation metadata factory.
+   *
+   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
+   *   The type of entity whose metadata needs to be retrieved.
+   *
+   * @return \Drupal\content_translation\ContentTranslationMetadataInterface
+   *   An instance of the content translation metadata handler.
+   */
+  public function getEntityTypeTranslationMetadata(EntityTypeInterface $entity_type);
+
+  /**
+   * Content translation metadata factory.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $translation
+   *   The entity translation whose metadata needs to be retrieved.
+   *
+   * @return \Drupal\content_translation\ContentTranslationMetadataInterface
+   *   An instance of the content translation metadata handler.
+   */
+  public function getTranslationMetadata(EntityInterface $translation);
+
 }
diff --git a/core/modules/content_translation/src/ContentTranslationMetadata.php b/core/modules/content_translation/src/ContentTranslationMetadata.php
new file mode 100644
index 0000000..ae0fc6d
--- /dev/null
+++ b/core/modules/content_translation/src/ContentTranslationMetadata.php
@@ -0,0 +1,196 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\content_translation\ContentTranslationMetadata.
+ */
+
+namespace Drupal\content_translation;
+
+use Drupal\Component\Utility\String;
+use Drupal\Core\Entity\EntityInterface;
+use Drupal\Core\Entity\EntityTypeInterface;
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\Language\LanguageInterface;
+
+/**
+ * Base class for content translation metadata handlers.
+ */
+class ContentTranslationMetadata implements ContentTranslationMetadataInterface {
+
+  /**
+   * @var \Drupal\Core\Entity\EntityTypeInterface
+   */
+  protected $entityType;
+
+  /**
+   * @var \Drupal\Core\Entity\EntityInterface|\Drupal\Core\TypedData\TranslatableInterface|\Drupal\Core\TypedData\ComplexDataInterface
+   */
+  protected $translation;
+
+  /**
+   * Initializes an instance of the content translation metadata handler.
+   */
+  public function __construct(EntityTypeInterface $entity_type) {
+    $this->entityType = $entity_type;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldDefinitions() {
+    $definitions = array();
+
+    $definitions['translation_source'] = BaseFieldDefinition::create('language')
+      ->setLabel(t('Translation source'))
+      ->setDescription(t('The source language from which this translation was created.'))
+      ->setDefaultValue(LanguageInterface::LANGCODE_NOT_SPECIFIED)
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE);
+
+    $definitions['translation_outdated'] = BaseFieldDefinition::create('boolean')
+      ->setLabel(t('Translation outdated'))
+      ->setDescription(t('A boolean indicating whether this translation needs to be updated.'))
+      ->setDefaultValue(FALSE)
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE);
+
+    $definitions['translation_uid'] = BaseFieldDefinition::create('entity_reference')
+      ->setLabel(t('Translation author'))
+      ->setDescription(t('The author of this translation.'))
+      ->setSetting('target_type', 'user')
+      ->setSetting('handler', 'default')
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE);
+
+    $definitions['translation_status'] = BaseFieldDefinition::create('boolean')
+      ->setLabel(t('Translation status'))
+      ->setDescription(t('A boolean indicating whether the translation is visible to non-translators.'))
+      ->setDefaultValue(TRUE)
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE);
+
+    $definitions['translation_created'] = BaseFieldDefinition::create('created')
+      ->setLabel(t('Translation created time'))
+      ->setDescription(t('The Unix timestamp when the translation was created.'))
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE);
+
+    $definitions['translation_changed'] = BaseFieldDefinition::create('changed')
+      ->setLabel(t('Translation changed time'))
+      ->setDescription(t('The Unix timestamp when the translation was most recently saved.'))
+      ->setPropertyConstraints('value', array('EntityChanged' => array()))
+      ->setRevisionable(TRUE)
+      ->setTranslatable(TRUE);
+
+    return $definitions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setTranslation(EntityInterface $translation) {
+    if ($translation->getEntityTypeId() == $this->entityType->id()) {
+      $this->translation = $translation;
+      return $this;
+    }
+    else {
+      $args = array(
+        '@entity_type_id' => $translation->getEntityTypeId(),
+        '@expected_entity_type_id' => $this->entityType->id(),
+      );
+      throw new \LogicException(String::format('The translation object has the wrong entity type @entity_type_id (expected @expected_entity_type_id).', $args));
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getSource() {
+    return $this->translation->get('translation_source')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setSource($source) {
+    $this->translation->set('translation_source', $source);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isOutdated() {
+    return (bool) $this->translation->get('translation_outdated')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setOutdated($outdated) {
+    $this->translation->set('translation_outdated', $outdated);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getAuthor() {
+    return $this->translation->get('translation_uid')->entity;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setAuthorId($uid) {
+    $this->translation->set('translation_uid', $uid);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isPublished() {
+    return (bool) $this->translation->get('translation_status')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setPublished($published) {
+    $this->translation->set('translation_status', $published);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCreatedTime() {
+    return $this->translation->get('translation_created')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setCreatedTime($timestamp) {
+    $this->translation->set('translation_created', $timestamp);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getChangedTime() {
+    return $this->translation->get('translation_changed')->value;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setChangedTime($timestamp) {
+    $this->translation->set('translation_changed', $timestamp);
+    return $this;
+  }
+
+}
diff --git a/core/modules/content_translation/src/ContentTranslationMetadataInterface.php b/core/modules/content_translation/src/ContentTranslationMetadataInterface.php
new file mode 100644
index 0000000..f318027
--- /dev/null
+++ b/core/modules/content_translation/src/ContentTranslationMetadataInterface.php
@@ -0,0 +1,140 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\content_translation\ContentTranslationMetadataInterface.
+ */
+
+namespace Drupal\content_translation;
+
+use Drupal\Core\Entity\EntityChangedInterface;
+use Drupal\Core\Entity\EntityInterface;
+
+/**
+ * Common interface for content translation metadata handlers.
+ *
+ * The metadata handler can act as a wrapper for an entity translation object,
+ * encapsulating the logic needed to retrieve translation metadata. The handler
+ * does not require a translation object to be instantiated as it can be used
+ * just to retrieve the field definitions used to store translation metadata.
+ */
+interface ContentTranslationMetadataInterface extends EntityChangedInterface {
+
+  /**
+   * Returns a set of field definitions to be used to store metadata items.
+   *
+   * @return \Drupal\Core\Field\FieldDefinitionInterface[]
+   */
+  public function getFieldDefinitions();
+
+  /**
+   * Sets the wrapped translation object.
+   *
+   * @param \Drupal\Core\Entity\EntityInterface $translation
+   *   The translation object to be wrapped.
+   *
+   * @return $this
+   */
+  public function setTranslation(EntityInterface $translation);
+
+  /**
+   * Retrieves the source language for this translation.
+   *
+   * @return string
+   *   The source language code.
+   */
+  public function getSource();
+
+  /**
+   * Sets the source language for this translation.
+   *
+   * @param string $source
+   *   The source language code.
+   *
+   * @return $this
+   */
+  public function setSource($source);
+
+  /**
+   * Returns the translation outdated status.
+   *
+   * @return bool
+   *   TRUE if the translation is outdated, FALSE otherwise.
+   */
+  public function isOutdated();
+
+  /**
+   * Sets the translation outdated status.
+   *
+   * @param bool $outdated
+   *   TRUE if the translation is outdated, FALSE otherwise.
+   *
+   * @return $this
+   */
+  public function setOutdated($outdated);
+
+  /**
+   * Returns the translation author.
+   *
+   * @return \Drupal\user\UserInterface
+   *   The user entity for the translation author.
+   */
+  public function getAuthor();
+
+  /**
+   * Sets the translation author.
+   *
+   * @param int $uid
+   *   The user ID of the translation author.
+   *
+   * @return $this
+   */
+  public function setAuthorId($uid);
+
+  /**
+   * Returns the translation published status.
+   *
+   * @return bool
+   *   TRUE if the translation is published, FALSE otherwise.
+   */
+  public function isPublished();
+
+  /**
+   * Sets the translation published status.
+   *
+   * @param bool $published
+   *   TRUE if the translation is published, FALSE otherwise.
+   *
+   * @return $this
+   */
+  public function setPublished($published);
+
+  /**
+   * Returns the translation creation timestamp.
+   *
+   * @return int
+   *   The UNIX timestamp of when the translation was created.
+   */
+  public function getCreatedTime();
+
+  /**
+   * Sets the translation creation timestamp.
+   *
+   * @param int $timestamp
+   *   The UNIX timestamp of when the translation was created.
+   *
+   * @return $this
+   */
+  public function setCreatedTime($timestamp);
+
+  /**
+   * Sets the translation modification timestamp.
+   *
+   * @param int $timestamp
+   *   The UNIX timestamp of when the translation was last modified.
+   *
+   * @return $this
+   */
+  public function setChangedTime($timestamp);
+
+}
diff --git a/core/modules/content_translation/src/Controller/ContentTranslationController.php b/core/modules/content_translation/src/Controller/ContentTranslationController.php
index 93b4887..92a9583 100644
--- a/core/modules/content_translation/src/Controller/ContentTranslationController.php
+++ b/core/modules/content_translation/src/Controller/ContentTranslationController.php
@@ -7,10 +7,12 @@
 
 namespace Drupal\content_translation\Controller;
 
+use Drupal\content_translation\ContentTranslationManagerInterface;
 use Drupal\Core\Controller\ControllerBase;
 use Drupal\Core\Entity\ContentEntityInterface;
 use Drupal\Core\Language\LanguageInterface;
 use Drupal\Core\Url;
+use Symfony\Component\DependencyInjection\ContainerInterface;
 use Symfony\Component\HttpFoundation\Request;
 
 /**
@@ -19,6 +21,30 @@
 class ContentTranslationController extends ControllerBase {
 
   /**
+   * The content translation manager.
+   *
+   * @var \Drupal\content_translation\ContentTranslationManagerInterface
+   */
+  protected $manager;
+
+  /**
+   * Initializes a content translation controller.
+   *
+   * @param \Drupal\content_translation\ContentTranslationManagerInterface
+   *   A content translation manager instance.
+   */
+  public function __construct(ContentTranslationManagerInterface $manager) {
+    $this->manager = $manager;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public static function create(ContainerInterface $container) {
+    return new static($container->get('content_translation.manager'));
+  }
+
+  /**
    * Populates target values with the source values.
    *
    * @param \Drupal\Core\Entity\ContentEntityInterface $entity
@@ -46,9 +72,11 @@ public function prepareTranslation(ContentEntityInterface $entity, LanguageInter
    *   Array of page elements to render.
    */
   public function overview(Request $request, $entity_type_id = NULL) {
+    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
     $entity = $request->attributes->get($entity_type_id);
     $account = $this->currentUser();
     $handler = $this->entityManager()->getHandler($entity_type_id, 'translation');
+    $manager = $this->manager;
 
     $languages = $this->languageManager()->getLanguages();
     $original = $entity->getUntranslated()->language()->getId();
@@ -69,8 +97,9 @@ public function overview(Request $request, $entity_type_id = NULL) {
       }
 
       // Show source-language column if there are non-original source langcodes.
-      $additional_source_langcodes = array_filter($entity->translation, function ($translation) use ($original) {
-        return !empty($translation['source']) && $translation['source'] != $original;
+      $additional_source_langcodes = array_filter(array_keys($translations), function ($langcode) use ($entity, $original, $manager) {
+        $source = $manager->getTranslationMetadata($entity->getTranslation($langcode))->getSource();
+        return $source != $original && $source != LanguageInterface::LANGCODE_NOT_SPECIFIED;
       });
       $show_source_column = !empty($additional_source_langcodes);
 
@@ -119,7 +148,9 @@ public function overview(Request $request, $entity_type_id = NULL) {
         $links = &$operations['data']['#links'];
         if (array_key_exists($langcode, $translations)) {
           // Existing translation in the translation set: display status.
-          $source = isset($entity->translation[$langcode]['source']) ? $entity->translation[$langcode]['source'] : '';
+          $translation = $entity->getTranslation($langcode);
+          $metadata = $manager->getTranslationMetadata($translation);
+          $source = $metadata->getSource() ?: LanguageInterface::LANGCODE_NOT_SPECIFIED;
           $is_original = $langcode == $original;
           $label = $entity->getTranslation($langcode)->label();
           $link = isset($links->links[$langcode]['href']) ? $links->links[$langcode] : array('href' => $entity->getSystemPath());
@@ -146,13 +177,12 @@ public function overview(Request $request, $entity_type_id = NULL) {
           if (isset($links['edit'])) {
             $links['edit']['title'] = $this->t('Edit');
           }
-          $translation = $entity->translation[$langcode];
           $status = array('data' => array(
             '#type' => 'inline_template',
             '#template' => '<span class="status">{% if status %}{{ "Published"|t }}{% else %}{{ "Not published"|t }}{% endif %}</span>{% if outdated %} <span class="marker">{{ "outdated"|t }}</span>{% endif %}',
             '#context' => array(
-              'status' => $translation['status'],
-              'outdated' => $translation['outdated'],
+              'status' => $metadata->isPublished(),
+              'outdated' => $metadata->isOutdated(),
             ),
           ));
 
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php b/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php
index 09ae752..82301e4 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationSyncImageTest.php
@@ -117,10 +117,6 @@ function testImageFieldSync() {
     $default_langcode = $this->langcodes[0];
     $langcode = $this->langcodes[1];
 
-    // Populate the required contextual values.
-    $attributes = \Drupal::request()->attributes;
-    $attributes->set('source_langcode', $default_langcode);
-
     // Populate the test entity with some random initial values.
     $values = array(
       'name' => $this->randomMachineName(),
@@ -188,6 +184,7 @@ function testImageFieldSync() {
 
     // Perform synchronization: the translation language is used as source,
     // while the default language is used as target.
+    $this->manager->getTranslationMetadata($translation)->setSource($default_langcode);
     $entity = $this->saveEntity($translation);
     $translation = $entity->getTranslation($langcode);
 
@@ -217,8 +214,6 @@ function testImageFieldSync() {
       'title' => $langcode . '_' . $removed_fid . '_' . $this->randomMachineName(),
     );
     $translation->{$this->fieldName}->setValue(array_values($values[$langcode]));
-    // When updating an entity we do not have a source language defined.
-    $attributes->remove('source_langcode');
     $entity = $this->saveEntity($translation);
     $translation = $entity->getTranslation($langcode);
 
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php b/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php
index 2b8cf97..609a17c 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationTestBase.php
@@ -79,6 +79,11 @@
    */
   protected $controller;
 
+  /**
+   * @var \Drupal\content_translation\ContentTranslationManagerInterface
+   */
+  protected $manager;
+
   protected function setUp() {
     parent::setUp();
 
@@ -88,6 +93,7 @@ protected function setUp() {
     $this->setupUsers();
     $this->setupTestFields();
 
+    $this->manager = $this->container->get('content_translation.manager');
     $this->controller = content_translation_controller($this->entityTypeId);
 
     // Rebuild the container so that the new languages are picked up by services
@@ -167,6 +173,7 @@ protected function enableTranslation() {
     drupal_static_reset();
     \Drupal::entityManager()->clearCachedDefinitions();
     \Drupal::service('router.builder')->rebuild();
+    \Drupal::service('entity.definition_update_manager')->applyUpdates();
   }
 
   /**
diff --git a/core/modules/content_translation/src/Tests/ContentTranslationUITest.php b/core/modules/content_translation/src/Tests/ContentTranslationUITest.php
index 58d0c59..7e132f7 100644
--- a/core/modules/content_translation/src/Tests/ContentTranslationUITest.php
+++ b/core/modules/content_translation/src/Tests/ContentTranslationUITest.php
@@ -8,7 +8,6 @@
 namespace Drupal\content_translation\Tests;
 
 use Drupal\Core\Entity\EntityInterface;
-use Drupal\Core\Entity\ContentEntityBase;
 use Drupal\Core\Language\Language;
 use Drupal\Core\Language\LanguageInterface;
 
@@ -160,7 +159,7 @@ protected function doTestOutdatedStatus() {
         $this->drupalGet($path);
         $this->assertFieldByXPath('//input[@name="content_translation[retranslate]"]', FALSE, 'The retranslate flag is now shown.');
         $entity = entity_load($this->entityTypeId, $this->entityId, TRUE);
-        $this->assertFalse($entity->translation[$added_langcode]['outdated'], 'The "outdated" status has been correctly stored.');
+        $this->assertFalse($this->manager->getTranslationMetadata($entity->getTranslation($added_langcode))->isOutdated(), 'The "outdated" status has been correctly stored.');
       }
     }
   }
@@ -178,7 +177,7 @@ protected function doTestPublishedStatus() {
         $edit = array('content_translation[status]' => FALSE);
         $this->drupalPostForm($langcode . '/' . $path, $edit, $this->getFormSubmitAction($entity, $langcode));
         $entity = entity_load($this->entityTypeId, $this->entityId, TRUE);
-        $this->assertFalse($entity->translation[$langcode]['status'], 'The translation has been correctly unpublished.');
+        $this->assertFalse($this->manager->getTranslationMetadata($entity->getTranslation($langcode))->isPublished(), 'The translation has been correctly unpublished.');
       }
     }
 
@@ -212,8 +211,9 @@ protected function doTestAuthoringInfo() {
 
     $entity = entity_load($this->entityTypeId, $this->entityId, TRUE);
     foreach ($this->langcodes as $langcode) {
-      $this->assertEqual($entity->translation[$langcode]['uid'], $values[$langcode]['uid'], 'Translation author correctly stored.');
-      $this->assertEqual($entity->translation[$langcode]['created'], $values[$langcode]['created'], 'Translation date correctly stored.');
+      $metadata = $this->manager->getTranslationMetadata($entity->getTranslation($langcode));
+      $this->assertEqual($metadata->getAuthor()->id(), $values[$langcode]['uid'], 'Translation author correctly stored.');
+      $this->assertEqual($metadata->getCreatedTime(), $values[$langcode]['created'], 'Translation date correctly stored.');
     }
 
     // Try to post non valid values and check that they are rejected.
@@ -225,8 +225,9 @@ protected function doTestAuthoringInfo() {
     );
     $this->drupalPostForm($path, $edit, $this->getFormSubmitAction($entity, $langcode));
     $this->assertTrue($this->xpath('//div[contains(@class, "error")]//ul'), 'Invalid values generate a list of form errors.');
-    $this->assertEqual($entity->translation[$langcode]['uid'], $values[$langcode]['uid'], 'Translation author correctly kept.');
-    $this->assertEqual($entity->translation[$langcode]['created'], $values[$langcode]['created'], 'Translation date correctly kept.');
+    $metadata = $this->manager->getTranslationMetadata($entity->getTranslation($langcode));
+    $this->assertEqual($metadata->getAuthor()->id(), $values[$langcode]['uid'], 'Translation author correctly kept.');
+    $this->assertEqual($metadata->getCreatedTime(), $values[$langcode]['created'], 'Translation date correctly kept.');
   }
 
   /**
diff --git a/core/modules/node/src/Entity/Node.php b/core/modules/node/src/Entity/Node.php
index ef8c23b..5a723c0 100644
--- a/core/modules/node/src/Entity/Node.php
+++ b/core/modules/node/src/Entity/Node.php
@@ -35,7 +35,8 @@
  *       "edit" = "Drupal\node\NodeForm"
  *     },
  *     "list_builder" = "Drupal\node\NodeListBuilder",
- *     "translation" = "Drupal\node\NodeTranslationHandler"
+ *     "translation" = "Drupal\node\NodeTranslationHandler",
+ *     "content_translation_metadata" = "Drupal\node\NodeTranslationMetadata"
  *   },
  *   base_table = "node",
  *   data_table = "node_field_data",
diff --git a/core/modules/node/src/NodeTranslationMetadata.php b/core/modules/node/src/NodeTranslationMetadata.php
new file mode 100644
index 0000000..82fa00c
--- /dev/null
+++ b/core/modules/node/src/NodeTranslationMetadata.php
@@ -0,0 +1,93 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\node\NodeTranslationMetadata.
+ */
+
+namespace Drupal\node;
+
+use Drupal\content_translation\ContentTranslationMetadata;
+
+/**
+ * Node translation metadata handler.
+ */
+class NodeTranslationMetadata extends ContentTranslationMetadata {
+
+  /**
+   * @var \Drupal\node\NodeInterface
+   */
+  protected $translation;
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldDefinitions() {
+    $definitions = parent::getFieldDefinitions();
+    foreach (array('uid', 'status', 'created', 'changed') as $field_name) {
+      unset($definitions['translation_' . $field_name]);
+    }
+    return $definitions;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getAuthor() {
+    return $this->translation->getOwner();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setAuthorId($uid) {
+    $this->translation->setOwnerId($uid);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function isPublished() {
+    return $this->translation->isPublished();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setPublished($published) {
+    $this->translation->setPublished($published);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getCreatedTime() {
+    return $this->translation->getCreatedTime();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setCreatedTime($timestamp) {
+    $this->translation->setCreatedTime($timestamp);
+    return $this;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getChangedTime() {
+    return $this->translation->getChangedTime();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setChangedTime($timestamp) {
+    $this->translation->set('changed', $timestamp);
+    return $this;
+  }
+
+}
diff --git a/core/modules/node/src/Tests/NodeTranslationUITest.php b/core/modules/node/src/Tests/NodeTranslationUITest.php
index 13eced4..e4baf7c 100644
--- a/core/modules/node/src/Tests/NodeTranslationUITest.php
+++ b/core/modules/node/src/Tests/NodeTranslationUITest.php
@@ -127,9 +127,8 @@ protected function doTestPublishedStatus() {
         // The node is created as unpublished thus we switch to the published
         // status first.
         $status = !$index;
-        $this->assertEqual($status, $entity->translation[$langcode]['status'], 'The translation has been correctly unpublished.');
         $translation = $entity->getTranslation($langcode);
-        $this->assertEqual($status, $translation->isPublished(), 'The status of the translation has been correctly saved.');
+        $this->assertEqual($status, $this->manager->getTranslationMetadata($translation)->isPublished(), 'The translation has been correctly unpublished.');
       }
     }
   }
@@ -164,11 +163,10 @@ protected function doTestAuthoringInfo() {
 
     $entity = entity_load($this->entityTypeId, $this->entityId, TRUE);
     foreach ($this->langcodes as $langcode) {
-      $this->assertEqual($entity->translation[$langcode]['uid'], $values[$langcode]['uid'], 'Translation author correctly stored.');
-      $this->assertEqual($entity->translation[$langcode]['created'], $values[$langcode]['created'], 'Translation date correctly stored.');
       $translation = $entity->getTranslation($langcode);
-      $this->assertEqual($translation->getOwnerId(), $values[$langcode]['uid'], 'Author of translation correctly stored.');
-      $this->assertEqual($translation->getCreatedTime(), $values[$langcode]['created'], 'Date of Translation correctly stored.');
+      $metadata = $this->manager->getTranslationMetadata($translation);
+      $this->assertEqual($metadata->getAuthor()->id(), $values[$langcode]['uid'], 'Translation author correctly stored.');
+      $this->assertEqual($metadata->getCreatedTime(), $values[$langcode]['created'], 'Translation date correctly stored.');
       $this->assertEqual($translation->isSticky(), $values[$langcode]['sticky'], 'Sticky of Translation correctly stored.');
       $this->assertEqual($translation->isPromoted(), $values[$langcode]['promote'], 'Promoted of Translation correctly stored.');
     }
@@ -215,7 +213,7 @@ public function testDisabledBundle() {
     ));
 
     // Make sure that nothing was inserted into the {content_translation} table.
-    $rows = db_query('SELECT * FROM {content_translation}')->fetchAll();
+    $rows = db_query('SELECT nid, count(nid) AS count FROM {node_field_data} WHERE type <> :type GROUP BY nid HAVING count >= 2', array(':type' => $this->bundle))->fetchAll();
     $this->assertEqual(0, count($rows));
 
     // Ensure the translation tab is not accessible.
diff --git a/core/modules/taxonomy/src/Tests/TermTranslationUITest.php b/core/modules/taxonomy/src/Tests/TermTranslationUITest.php
index f96f357..18616e1 100644
--- a/core/modules/taxonomy/src/Tests/TermTranslationUITest.php
+++ b/core/modules/taxonomy/src/Tests/TermTranslationUITest.php
@@ -95,9 +95,9 @@ public function testTranslationUI() {
 
     // Make sure that no row was inserted for taxonomy vocabularies which do
     // not have translations enabled.
-    $rows = db_query('SELECT * FROM {content_translation}')->fetchAll();
+    $rows = db_query('SELECT tid, count(tid) AS count FROM {taxonomy_term_field_data} WHERE vid <> :vid GROUP BY tid', array(':vid' => $this->bundle))->fetchAll();
     foreach ($rows as $row) {
-      $this->assertEqual('taxonomy_term', $row->entity_type, 'Row contains a taxonomy term.');
+      $this->assertTrue($row->count < 2, 'Term does not have translations.');
     }
   }
 
