diff --git a/lib/core/services/lnurl_service.dart b/lib/core/services/lnurl_service.dart
index 32648bc..b2e8c52 100644
--- a/lib/core/services/lnurl_service.dart
+++ b/lib/core/services/lnurl_service.dart
@@ -153,7 +153,7 @@ class LnurlService {
     if (pad && bits > 0) {
       result.add((acc << (toBits - bits)) & maxv);
     } else if (!pad && (bits >= fromBits || ((acc << (toBits - bits)) & maxv) != 0)) {
-      // Invalid padding
+      throw FormatException('Invalid padding in bech32 conversion');
     }
 
     return result;
diff --git a/lib/screens/7_melt/melt_screen.dart b/lib/screens/7_melt/melt_screen.dart
index b18809d..cd610b3 100644
--- a/lib/screens/7_melt/melt_screen.dart
+++ b/lib/screens/7_melt/melt_screen.dart
@@ -678,7 +678,7 @@ class _MeltScreenState extends State<MeltScreen> {
       if (mounted) {
         setState(() {
           _isResolvingLnurl = false;
-          _errorMessage = 'Error LNURL: ${e.toString().replaceFirst('Exception: ', '')}';
+          _errorMessage = L10n.of(context)!.paymentError(e.toString().replaceFirst('Exception: ', ''));
         });
       }
     }
@@ -710,7 +710,7 @@ class _MeltScreenState extends State<MeltScreen> {
       if (mounted) {
         setState(() {
           _isResolvingLnurl = false;
-          _errorMessage = 'Error: ${e.toString().replaceFirst('Exception: ', '')}';
+          _errorMessage = L10n.of(context)!.paymentError(e.toString().replaceFirst('Exception: ', ''));
         });
       }
     }