diff --git a/administrator/components/com_patchtester/language/es-ES/com_patchtester.ini b/administrator/components/com_patchtester/language/es-ES/com_patchtester.ini
index 0a237db..19276d1 100644
--- a/administrator/components/com_patchtester/language/es-ES/com_patchtester.ini
+++ b/administrator/components/com_patchtester/language/es-ES/com_patchtester.ini
@@ -4,6 +4,7 @@
 ; Note : All ini files need to be saved as UTF-8
 
 COM_PATCHTESTER="Joomla! Patch Tester"
+COM_PATCHTESTER_40_WARNING="While Joomla! 4.0 is in development, using the patch tester is considered experimental since breaking changes may be merged into Joomla, including the code contained in a patch."
 COM_PATCHTESTER_API_LIMIT_ACTION="Se ha alcanzado la tasa límite de la API de Github para este recurso, no se pudo conectar a Github para llevar a cabo la acción solicitada. El límite se restablecerá a %s"
 COM_PATCHTESTER_API_LIMIT_LIST="Se ha alcanzado la tasa límite de la API de Github para este recurso, no se pudo conectar a Github para obtener datos actualizados. El límite se restablecerá a %s"
 COM_PATCHTESTER_APPLIED="Aplicado"