diff --git a/src/Plugin/search_api/datasource/ContentEntity.php b/src/Plugin/search_api/datasource/ContentEntity.php
index 113ad3c..a26306b 100644
--- a/src/Plugin/search_api/datasource/ContentEntity.php
+++ b/src/Plugin/search_api/datasource/ContentEntity.php
@@ -264,18 +264,23 @@ class ContentEntity extends DatasourcePluginBase {
     $all_languages = $this->getLanguageManager()->getLanguages();
     $configuration = $this->configuration;
 
-    if ($configuration['default']) {
-      $allowed_languages = $all_languages;
-      foreach ($configuration['languages'] as $langcode) {
-        unset($allowed_languages[$langcode]);
+
+    if ($this->isTranslatable()) {
+      if ($configuration['default']) {
+        $allowed_languages = $all_languages;
+        foreach ($configuration['languages'] as $langcode) {
+          unset($allowed_languages[$langcode]);
+        }
       }
-    }
-    else {
-      foreach ($configuration['languages'] as $langcode => $checked) {
-        if ($checked === $langcode) {
-          $allowed_languages[$langcode] = $all_languages[$langcode];
+      else {
+        foreach ($configuration['languages'] as $langcode => $checked) {
+          if ($checked === $langcode) {
+            $allowed_languages[$langcode] = $all_languages[$langcode];
+          }
         }
       }
+    } else {
+      $allowed_languages = $all_languages;
     }
 
     /** @var \Drupal\Core\Entity\ContentEntityInterface[] $entities */