diff -u b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
--- b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
+++ b/core/lib/Drupal/Core/Entity/DatabaseStorageController.php
@@ -645,7 +645,7 @@
       $revision_query = $this->database->insert($revision_name)->fields($columns);
 
       foreach ($entity->getTranslationLanguages() as $langcode => $language) {
-        $items = (array) $entity->getTranslation($langcode)->{$field_name}->getValue();
+        $items = $entity->getTranslation($langcode)->{$field_name}->getValue();
         $delta_count = 0;
         foreach ($items as $delta => $item) {
           // We now know we have someting to insert.
diff -u b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ConfigTestTranslationUITest.php b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ConfigTestTranslationUITest.php
--- b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ConfigTestTranslationUITest.php
+++ b/core/modules/content_translation/lib/Drupal/content_translation/Tests/ConfigTestTranslationUITest.php
@@ -54,22 +54,24 @@
   }
 
   /**
-   * Overrides ContentTranslationTest::testTranslationUI().
+   * Overrides \Drupal\content_translation\Tests\ContentTranslationUITest::::testTranslationUI().
    *
-   * @todo This override is a copy-paste of parts of the parent method. Turn
-   *   ConfigTest into a properly translatable entity and remove this override.
+   * @todo Config entities are not translatable, but Content Translation module
+   *   doesn't have a clean way to enforce that, so this test is here to ensure
+   *   the module doesn't interfere with basic config entity storage.
+   *   Reconsider the purpose of this test after http://drupal.org/node/2004244
+   *   and either remove it or rewrite it to more clearly test what is needed.
    */
   function testTranslationUI() {
     // Create a new test entity with original values in the default language.
     $default_langcode = $this->langcodes[0];
-    $values[$default_langcode] = $this->getNewEntityValues($default_langcode);
-    $id = $this->createEntity($values[$default_langcode], $default_langcode);
+    $values = $this->getNewEntityValues($default_langcode);
+    $id = $this->createEntity($values, $default_langcode);
     $entity = entity_load($this->entityType, $id, TRUE);
     $this->assertTrue($entity, 'Entity found in the database.');
 
-    foreach ($values[$default_langcode] as $property => $value) {
+    foreach ($values as $property => $value) {
       $stored_value = $entity->{$property};
-      $value = is_array($value) ? $value[0]['value'] : $value;
       $message = format_string('@property correctly stored in the default language.', array('@property' => $property));
       $this->assertIdentical($stored_value, $value, $message);
     }
diff -u b/core/modules/field/field.multilingual.inc b/core/modules/field/field.multilingual.inc
--- b/core/modules/field/field.multilingual.inc
+++ b/core/modules/field/field.multilingual.inc
@@ -89,8 +89,7 @@
   foreach ($field_langcodes as $field_name => $field_langcode) {
     // If the requested language is defined for the current field use it,
     // otherwise search for a fallback value among the fallback candidates.
-    $value = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode)->$field_name->getValue() : NULL;
-    if (!empty($value) && is_array($value) && array_filter($value, function($value) { return array_filter($value); })) {
+    if (_field_translated_value_exists($entity, $langcode, $field_name)) {
       $field_langcodes[$field_name] = $langcode;
     }
     else {
@@ -99,8 +98,7 @@
         $fallback_candidates = language_fallback_get_candidates();
       }
       foreach ($fallback_candidates as $fallback_langcode) {
-        $value = $entity->hasTranslation($fallback_langcode) ? $entity->getTranslation($fallback_langcode)->$field_name->getValue() : NULL;
-        if (!empty($value) && is_array($value) && array_filter($value, function($value) { return array_filter($value); })) {
+        if (_field_translated_value_exists($entity, $fallback_langcode, $field_name)) {
           $field_langcodes[$field_name] = $fallback_langcode;
           break;
         }
@@ -311,8 +309,7 @@
     // if the field translation is not available. It is up to translation
     // handlers to implement language fallback rules.
     foreach (field_info_instances($entity_type, $bundle) as $instance) {
-      $value = $entity->hasTranslation($langcode) ? $entity->getTranslation($langcode)->{$instance['field_name']}->getValue() : NULL;
-      if (!empty($value) && is_array($value) && array_filter($value, function($value) { return array_filter($value); })) {
+      if (_field_translated_value_exists($entity, $langcode, $instance['field_name'])) {
         $display_langcode[$instance['field_name']] = $langcode;
       }
       else {
@@ -356,0 +354,13 @@
+
+/**
+ * Returns TRUE if a non-empty value exists for a given entity/language/field.
+ */
+function _field_translated_value_exists(EntityInterface $entity, $langcode, $field_name) {
+  if (!$entity->hasTranslation($langcode)) {
+    return FALSE;
+  }
+  $field = $entity->getTranslation($langcode)->$field_name;
+  $field->filterEmptyValues();
+  $value = $field->getValue();
+  return !empty($value);
+}