diff --git a/back/methods/vn-user/addAlias.js b/back/methods/vn-user/addAlias.js
index a9a5dcb85..9fe43e713 100644
--- a/back/methods/vn-user/addAlias.js
+++ b/back/methods/vn-user/addAlias.js
@@ -2,7 +2,7 @@ const UserError = require('vn-loopback/util/user-error');
 
 module.exports = Self => {
     Self.remoteMethod('addAlias', {
-        description: 'Add alias if user has grant',
+        description: 'Add an alias if the user has the grant',
         accessType: 'WRITE',
         accepts: [
             {
@@ -58,7 +58,7 @@ module.exports = Self => {
 
         const hasAlias = aliases.includes(mailAlias);
         if (!hasAlias)
-            throw new UserError(`You don't have the alias assigned and you can't assign it to another user`);
+            throw new UserError(`You cannot assign an alias that you are not assigned to`);
 
         return models.MailAliasAccount.create({
             mailAlias: mailAlias,
diff --git a/loopback/locale/es.json b/loopback/locale/es.json
index 63b20995d..809ed5874 100644
--- a/loopback/locale/es.json
+++ b/loopback/locale/es.json
@@ -299,5 +299,5 @@
 	"Mail not sent": "Se ha producido un fallo al enviar la factura al cliente [{{clientId}}]({{{clientUrl}}}), por favor revisa la dirección de correo electrónico",
 	"The renew period has not been exceeded": "El periodo de renovación no ha sido superado",
 	"Negative basis of tickets": "Base negativa para los tickets: {{ticketsIds}}",
-	"You don't have the alias assigned and you can't assign it to another user": "No tienes el alias asignado y no puedes asignarlo a otro usuario"
+	"You cannot assign an alias that you are not assigned to": "No puede asignar un alias que no tenga asignado"
 }