diff --git a/CRM/Core/I18n.php b/CRM/Core/I18n.php
index aff19c9f80d1..2f0e3207f352 100644
--- a/CRM/Core/I18n.php
+++ b/CRM/Core/I18n.php
@@ -193,7 +193,7 @@ public static function languages($justEnabled = FALSE) {
           if (preg_match('/^[a-z][a-z]_[A-Z][A-Z]$/', $filename)) {
             $codes[] = $filename;
             if (!isset($all[$filename])) {
-              $all[$filename] = $labels[$filename];
+              $all[$filename] = $labels[$filename] ?? "($filename)";
             }
           }
         }