diff --git a/application/language/es/sales_lang.php b/application/language/es/sales_lang.php
index cbd00a21e..839cae477 100644
--- a/application/language/es/sales_lang.php
+++ b/application/language/es/sales_lang.php
@@ -28,8 +28,8 @@ $lang["sales_customer_discount"] = "Descuento";
 $lang["sales_customer_email"] = "Email";
 $lang["sales_customer_location"] = "Ubicacion";
 $lang["sales_customer_mailchimp_status"] = "Estado de Mailchimp";
-$lang["sales_customer_optional"] = "";
-$lang["sales_customer_required"] = "";
+$lang["sales_customer_optional"] = "(Opcional)";
+$lang["sales_customer_required"] = "(Requerido)";
 $lang["sales_customer_total"] = "Total";
 $lang["sales_date"] = "Fecha";
 $lang["sales_date_range"] = "Rango de Fecha";
@@ -108,7 +108,7 @@ $lang["sales_quote_number_duplicate"] = "Cotizacion debe ser unico.";
 $lang["sales_quote_sent"] = "Cotizacion enviada a";
 $lang["sales_quote_unsent"] = "Cotización no se pudo enviar";
 $lang["sales_receipt"] = "Recibo de Venta";
-$lang["sales_receipt_no_email"] = "";
+$lang["sales_receipt_no_email"] = "Este cliente no tiene una direccion de correo valido";
 $lang["sales_receipt_number"] = "Venta #";
 $lang["sales_receipt_sent"] = "Recibo enviada a";
 $lang["sales_receipt_unsent"] = "Fallo el envio del recibo a";