diff --git a/core/includes/install.inc b/core/includes/install.inc
index e397dc4..b9ae3bd 100644
--- a/core/includes/install.inc
+++ b/core/includes/install.inc
@@ -612,6 +612,10 @@ function drupal_verify_profile($install_state) {
  *
  * Separated from the installation of other modules so core system
  * functions can be made available while other modules are installed.
+ *
+ * @param array $install_state
+ *   An array of information about the current installation state. This is used
+ *   to set the default language.
  */
 function drupal_install_system($install_state) {
   // Create tables.
diff --git a/core/lib/Drupal/Core/Config/Config.php b/core/lib/Drupal/Core/Config/Config.php
index b7be985..9c6bd3f 100644
--- a/core/lib/Drupal/Core/Config/Config.php
+++ b/core/lib/Drupal/Core/Config/Config.php
@@ -664,26 +664,37 @@ public function getRawData() {
   /**
    * Gets original data from this configuration object.
    *
+   * Original data is the data as it is immediately after loading from
+   * configuration storage before any changes. If this is a new configuration
+   * object it will be an empty array.
+   *
    * @see \Drupal\Core\Config\Config::get()
    *
+   * @param string $key
+   *   A string that maps to a key within the configuration data.
+   * @param bool $apply_overrides
+   *   Apply any overrides to the original data. Defaults to TRUE.
+   *
    * @return mixed
    *   The data that was requested.
    */
-  public function getOriginal($key = '') {
+  public function getOriginal($key = '', $apply_overrides = TRUE) {
     if (!$this->isLoaded) {
       $this->load();
     }
 
-    // Apply overrides.
-    $original_data = $this->originalData;
-    if (isset($this->languageOverrides) && is_array($this->languageOverrides)) {
-      $original_data = NestedArray::mergeDeepArray(array($original_data, $this->languageOverrides), TRUE);
-    }
-    if (isset($this->moduleOverrides) && is_array($this->moduleOverrides)) {
-      $original_data = NestedArray::mergeDeepArray(array($original_data, $this->moduleOverrides), TRUE);
-    }
-    if (isset($this->settingsOverrides) && is_array($this->settingsOverrides)) {
-      $original_data = NestedArray::mergeDeepArray(array($original_data, $this->settingsOverrides), TRUE);
+    if ($apply_overrides) {
+      // Apply overrides.
+      $original_data = $this->originalData;
+      if (isset($this->languageOverrides) && is_array($this->languageOverrides)) {
+        $original_data = NestedArray::mergeDeepArray(array($original_data, $this->languageOverrides), TRUE);
+      }
+      if (isset($this->moduleOverrides) && is_array($this->moduleOverrides)) {
+        $original_data = NestedArray::mergeDeepArray(array($original_data, $this->moduleOverrides), TRUE);
+      }
+      if (isset($this->settingsOverrides) && is_array($this->settingsOverrides)) {
+        $original_data = NestedArray::mergeDeepArray(array($original_data, $this->settingsOverrides), TRUE);
+      }
     }
 
     if (empty($key)) {