diff --git a/lib/file_locale.php b/lib/file_locale.php
--- a/lib/file_locale.php
+++ b/lib/file_locale.php
@@ -77,6 +77,8 @@
             array_unshift($langs, $_SESSION['env']['language']);
         }
 
+        $fallback = null;
+
         foreach (array_unique($langs) as $lang) {
             $lang = explode(';', $lang);
             $lang = $lang[0];
@@ -91,9 +93,14 @@
             ) {
                 return $alias;
             }
+
+            // Fall back to just returning the language identifier for reuse by the editor
+            if (!$fallback) {
+                $fallback = $lang;
+            }
         }
 
-        return null;
+        return $fallback;
     }
 
     /**