diff -u b/core/modules/file/src/Entity/File.php b/core/modules/file/src/Entity/File.php
--- b/core/modules/file/src/Entity/File.php
+++ b/core/modules/file/src/Entity/File.php
@@ -286,10 +286,9 @@
    *   disabled, the raw filename of the file.
    */
   public function getTransliteratedFilename() {
-
     // If the transliteration option is enabled, transliterate the filename.
     if (\Drupal::config('system.file')->get('filename_transliteration')) {
-      $langcode = $this->languageManager()->getCurrentLanguage()->getId();
+      $langcode = $this->language()->getId();
 
       // Transliterate and sanitize the destination filename.
       $filename = \Drupal::transliteration()