diff --git a/core/lib/Drupal/Core/Entity/ContentEntityBase.php b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
index 2ece2b5..2829589 100644
--- a/core/lib/Drupal/Core/Entity/ContentEntityBase.php
+++ b/core/lib/Drupal/Core/Entity/ContentEntityBase.php
@@ -773,6 +773,9 @@ public function removeTranslation($langcode) {
         }
       }
       $this->translations[$langcode]['status'] = static::TRANSLATION_REMOVED;
+      if ($this->activeLangcode == $langcode) {
+        $this->activeLangcode = LanguageInterface::LANGCODE_DEFAULT;
+      }
     }
     else {
       $message = 'The specified translation (@langcode) cannot be removed.';
diff --git a/core/lib/Drupal/Core/ParamConverter/EntityConverter.php b/core/lib/Drupal/Core/ParamConverter/EntityConverter.php
index 8759d56..e371509 100644
--- a/core/lib/Drupal/Core/ParamConverter/EntityConverter.php
+++ b/core/lib/Drupal/Core/ParamConverter/EntityConverter.php
@@ -8,7 +8,7 @@
 namespace Drupal\Core\ParamConverter;
 
 use Drupal\Core\Entity\EntityManagerInterface;
-use Drupal\Core\TypedData\TranslatableInterface;
+use Drupal\Core\Entity\EntityInterface;
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Routing\Route;
 
@@ -41,7 +41,7 @@ public function convert($value, $definition, $name, array $defaults, Request $re
     $entity_type = substr($definition['type'], strlen('entity:'));
     if ($storage = $this->entityManager->getStorage($entity_type)) {
       $entity = $storage->load($value);
-      if ($entity instanceof TranslatableInterface) {
+      if ($entity instanceof EntityInterface) {
         $entity = $this->entityManager->getTranslationFromContext($entity);
       }
       return $entity;