diff --git a/core/includes/common.inc b/core/includes/common.inc
index 78debc7..c169b58 100644
--- a/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -4627,6 +4627,11 @@ function drupal_render_page($page) {
     $page['content']['system_main'] = drupal_set_page_content();
   }
 
+  // Set page title, if exist.
+  if (isset($page['#page_title'])) {
+    drupal_set_title($page['#page_title']);
+  }
+
   return drupal_render($page);
 }
 
diff --git a/core/lib/Drupal/Core/Language/LanguageManager.php b/core/lib/Drupal/Core/Language/LanguageManager.php
index b4acc6a..01f1d50 100644
--- a/core/lib/Drupal/Core/Language/LanguageManager.php
+++ b/core/lib/Drupal/Core/Language/LanguageManager.php
@@ -76,12 +76,13 @@ public function setRequest(Request $request) {
    * Returns a language object for the given type.
    *
    * @param string $type
-   *   The language type, e.g. Language::TYPE_INTERFACE.
+   *   (optional) The language type, e.g. the interface or the content language.
+   *   Defaults to \Drupal\Core\Language\Language::TYPE_INTERFACE.
    *
    * @return \Drupal\Core\Language\Language
    *   A language object for the given type.
    */
-  public function getLanguage($type) {
+  public function getLanguage($type = Language::TYPE_INTERFACE) {
     if (isset($this->languages[$type])) {
       return $this->languages[$type];
     }