diff --git a/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/Localization/AbpLanguagesController.cs b/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/Localization/AbpLanguagesController.cs
index b697d1b194..dc44f12124 100644
--- a/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/Localization/AbpLanguagesController.cs
+++ b/framework/src/Volo.Abp.AspNetCore.Mvc/Volo/Abp/AspNetCore/Mvc/Localization/AbpLanguagesController.cs
@@ -25,7 +25,7 @@ public class AbpLanguagesController : AbpController
     {
         if (!CultureHelper.IsValidCultureCode(culture))
         {
-            throw new AbpException("Unknown language: " + culture + ". It must be a valid culture!");
+            throw new AbpException("The selected culture is not valid! Make sure you enter a valid culture code.");
         }
 
         AbpRequestCultureCookieHelper.SetCultureCookie(