diff --git a/src/Controller/NodeRevisionController.php b/src/Controller/NodeRevisionController.php
index 10a347e..2d853b6 100644
--- a/src/Controller/NodeRevisionController.php
+++ b/src/Controller/NodeRevisionController.php
@@ -65,7 +65,7 @@ class NodeRevisionController extends EntityComparisonBase {
     $storage = $this->entityManager()->getStorage('node');
     $left_revision = $storage->loadRevision($left_vid);
     $right_revision = $storage->loadRevision($right_vid);
-    $langcode = $this->languageManager()->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId();
+    $langcode = $node->language()->getId();
     $vids = [];
     // Filter revisions of current translation and where the translation is
     // affected.
diff --git a/src/Form/RevisionOverviewForm.php b/src/Form/RevisionOverviewForm.php
index 95309d0..7d494f1 100755
--- a/src/Form/RevisionOverviewForm.php
+++ b/src/Form/RevisionOverviewForm.php
@@ -116,8 +116,8 @@ class RevisionOverviewForm extends FormBase {
    */
   public function buildForm(array $form, FormStateInterface $form_state, $node = NULL) {
     $account = $this->currentUser;
-    $langcode = $this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId();
-    $langname = $this->languageManager->getLanguageName($langcode);
+    $langcode = $node->language()->getId();
+    $langname = $node->language()->getName();
     $languages = $node->getTranslationLanguages();
     $has_translations = (count($languages) > 1);
     $node_storage = $this->entityManager->getStorage('node');