diff --git a/core/modules/locale/locale.module b/core/modules/locale/locale.module
index 441f813..fd529b5 100644
--- a/core/modules/locale/locale.module
+++ b/core/modules/locale/locale.module
@@ -804,15 +804,15 @@ function locale_preprocess_node(&$variables) {
   /** @var \Drupal\node\NodeInterface $node */
   $node = $variables['node'];
   if ($node->language()->getId() != LanguageInterface::LANGCODE_NOT_SPECIFIED) {
-    $language_interface = \Drupal::languageManager()->getCurrentLanguage();
+    $interface_language = \Drupal::languageManager()->getCurrentLanguage();
 
     $node_language = $node->language();
-    if ($node_language->getId() != $language_interface->getId()) {
+    if ($node_language->getId() != $interface_language->getId()) {
       // If the node language was different from the page language, we should
       // add markup to identify the language. Otherwise the page language is
       // inherited.
       $variables['attributes']['lang'] = $node_language->getId();
-      if ($node_language->direction != $language_interface->getDirection()) {
+      if ($node_language->getDirection() != $interface_language->getDirection()) {
         // If text direction is different form the page's text direction, add
         // direction information as well.
         $dir = array('ltr', 'rtl');