diff --git a/lang/de/auth.php b/lang/de/auth.php
index 3ed8cb1..96ebb4f 100644
--- a/lang/de/auth.php
+++ b/lang/de/auth.php
@@ -34,6 +34,10 @@ return [
     'challenge_heading' => 'Bestätigung',
     'challenge_subtitle' => '6-stelliger Code aus deiner Authenticator-App.',
     'code' => 'Code',
+    'challenge_use_backup' => 'Backup-Code verwenden',
+    'backup_heading' => 'Backup-Codes',
+    'backup_subtitle' => 'Gib einen Backup-Code ein, um fortzufahren.',
+    'back_to_options' => 'Zurück zu Anmelde-Optionen',
     'back_to_login' => 'Zurück zur Anmeldung',
 
     // ── 2FA setup ────────────────────────────────────────────────────────
diff --git a/lang/en/auth.php b/lang/en/auth.php
index 11f363d..1504bf4 100644
--- a/lang/en/auth.php
+++ b/lang/en/auth.php
@@ -34,6 +34,10 @@ return [
     'challenge_heading' => 'Verification',
     'challenge_subtitle' => '6-digit code from your authenticator app.',
     'code' => 'Code',
+    'challenge_use_backup' => 'Use backup code',
+    'backup_heading' => 'Backup codes',
+    'backup_subtitle' => 'Enter a backup code to continue.',
+    'back_to_options' => 'Back to sign-in options',
     'back_to_login' => 'Back to sign in',
 
     // ── 2FA setup ────────────────────────────────────────────────────────