diff --git a/core/core.services.yml b/core/core.services.yml
index 6abd05c..2712650 100644
--- a/core/core.services.yml
+++ b/core/core.services.yml
@@ -80,7 +80,7 @@ services:
     tags:
       - { name: persist }
       - { name: event_subscriber }
-    arguments: ['@config.storage', '@event_dispatcher', '@config.typed']
+    arguments: ['@config.storage', '@event_dispatcher', '@config.typed', '@language_manager']
   config.installer:
     class: Drupal\Core\Config\ConfigInstaller
     arguments: ['@config.factory', '@config.storage', '@config.typed', '@entity.manager', '@event_dispatcher']
diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 5a46c8c..c228f29 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -385,14 +385,14 @@ function install_begin_request(&$install_state) {
       ->addArgument(new Reference('config.storage.schema'))
       ->addArgument(new Reference('cache.config'));
 
-    $container->register('config.factory', 'Drupal\Core\Config\ConfigFactory')
-      ->addArgument(new Reference('config.storage'))
-      ->addArgument(new Reference('event_dispatcher'))
-      ->addArgument(new Reference('config.typed'));
-
-    // Register the 'language_manager' service.
     $container->register('language_manager', 'Drupal\Core\Language\LanguageManager');
 
+    $container->register('config.factory', 'Drupal\Core\Config\ConfigFactory')
+      ->addArgument(new Reference('config.storage'))
+      ->addArgument(new Reference('event_dispatcher'))
+      ->addArgument(new Reference('config.typed'))
+      ->addArgument(new Reference('language_manager'));
+
     // Register the translation services.
     install_register_translation_service($container);
 
diff --git a/core/lib/Drupal/Core/Config/ConfigFactory.php b/core/lib/Drupal/Core/Config/ConfigFactory.php
index 8aeb301..fdca4ed 100644
--- a/core/lib/Drupal/Core/Config/ConfigFactory.php
+++ b/core/lib/Drupal/Core/Config/ConfigFactory.php
@@ -8,6 +8,7 @@
 namespace Drupal\Core\Config;
 
 use Drupal\Core\Language\Language;
+use Drupal\Core\Language\LanguageManagerInterface;
 use Symfony\Component\EventDispatcher\EventDispatcher;
 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
 
@@ -74,6 +75,13 @@ class ConfigFactory implements EventSubscriberInterface {
   protected $typedConfigManager;
 
   /**
+   * The language manager.
+   *
+   * @var \Drupal\Core\Language\LanguageManagerInterface
+   */
+  protected $languageManager;
+
+  /**
    * Constructs the Config factory.
    *
    * @param \Drupal\Core\Config\StorageInterface $storage
@@ -82,15 +90,18 @@ class ConfigFactory implements EventSubscriberInterface {
    *   An event dispatcher instance to use for configuration events.
    * @param \Drupal\Core\Config\TypedConfigManager $typed_config
    *   The typed configuration manager.
+   * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
+   *   The language manager.
    * @param \Drupal\Core\Language\Language
    *   (optional) The language for this configuration. The config factory will
    *   use it to override configuration data if language overrides are
    *   available.
    */
-  public function __construct(StorageInterface $storage, EventDispatcher $event_dispatcher, TypedConfigManager $typed_config, Language $language = NULL) {
+  public function __construct(StorageInterface $storage, EventDispatcher $event_dispatcher, TypedConfigManager $typed_config, LanguageManagerInterface $language_manager, Language $language = NULL) {
     $this->storage = $storage;
     $this->eventDispatcher = $event_dispatcher;
     $this->typedConfigManager = $typed_config;
+    $this->languageManager = $language_manager;
     $this->language = $language;
   }
 
@@ -144,8 +155,11 @@ public function get($name) {
         $this->cache[$cache_key] = new Config($name, $this->storage, $this->eventDispatcher, $this->typedConfigManager, $this->language);
 
         if ($this->canOverride($name)) {
-          // Get and apply any language overrides.
-          if ($this->language) {
+          // Language overrides are only applicable on multilingual environments
+          // and if the source file had a langcode which is different from the
+          // target language requested.
+          $langcode = $this->cache[$cache_key]->get('langcode');
+          if (!empty($langcode) && $this->language && $this->language->id != $langcode && $this->languageManager->isMultilingual()) {
             $language_overrides = $this->storage->read($this->getLanguageConfigName($this->language->id, $name));
           }
           else {
@@ -202,7 +216,7 @@ public function loadMultiple(array $names) {
       $module_overrides = array();
       $language_names = array();
 
-      if ($this->useOverrides) {
+      if ($this->useOverrides && $this->languageManager->isMultilingual()) {
         // In order to make just one call to storage, add in language names.
         // Keep track of them separately, so we can get language override data
         // returned from storage and set it on new Config objects.