diff --git a/botdiscord/translate.py b/botdiscord/translate.py
index 3aaab68..bee5fb0 100644
--- a/botdiscord/translate.py
+++ b/botdiscord/translate.py
@@ -129,10 +129,10 @@ async def translate_text(text: str, target_lang: str) -> str:
             translated_segments = await asyncio.gather(*tasks)
             result = "".join(translated_segments)
             
-            # Guardar en Redis por 24 horas
-            if result != text:
+            # No cachear mensajes de error
+            if result and result != text and "mantenimiento" not in result:
                 cache_set(redis_key, result, ttl=86400)
-            return result
+            return result if result else text
     except Exception:
         return text
 
diff --git a/panel/main.py b/panel/main.py
index 7ca0b46..b492f91 100644
--- a/panel/main.py
+++ b/panel/main.py
@@ -51,20 +51,28 @@ def translate_filter(text, lang="es"):
     if not text: return ""
 
     cache_key = f"ui:{lang}:{text}"
+    _BAD = "mantenimiento"  # Patron de respuesta de error a ignorar
     
     # 1. Redis (compartido y persistente entre reinicios)
     redis_val = cache_get(cache_key)
-    if redis_val:
+    if redis_val and _BAD not in redis_val:
         _ui_memory_cache[cache_key] = redis_val
         return redis_val
+    elif redis_val and _BAD in redis_val:
+        # Valor contaminado: eliminarlo del caché
+        from utils.cache import cache_delete
+        cache_delete(cache_key)
     
     # 2. RAM local (ultra rápida, temporal)
-    if cache_key in _ui_memory_cache:
-        return _ui_memory_cache[cache_key]
+    ram_val = _ui_memory_cache.get(cache_key)
+    if ram_val and _BAD not in ram_val:
+        return ram_val
+    elif cache_key in _ui_memory_cache:
+        del _ui_memory_cache[cache_key]
     
     # 3. Base de datos MySQL
     cached = get_ui_translation(text, lang)
-    if cached:
+    if cached and _BAD not in cached:
         _ui_memory_cache[cache_key] = cached
         cache_set(cache_key, cached, ttl=604800)  # 7 días
         return cached
@@ -73,12 +81,13 @@ def translate_filter(text, lang="es"):
     from botdiscord.translate import translate_text_sync
     translated = translate_text_sync(text, lang)
     
-    if translated and translated != text:
+    if translated and translated != text and _BAD not in translated:
         save_ui_translation(text, lang, translated)
         _ui_memory_cache[cache_key] = translated
         cache_set(cache_key, translated, ttl=604800)  # 7 días
+        return translated
         
-    return translated
+    return text  # Fallback: devolver el texto original si todo falla
 
 templates.env.filters["translate"] = translate_filter