Myth::Auth unable to translate registration error message

That is because it is a CodeIgniter Validation message if you take a look in the system folder

..\system\Language\en\Language.php

You will see the message that you are getting.

It's an CodeIgniter 4 message not Myth::Auth

What did you Try? What did you Get? What did you Expect?

Joined CodeIgniter Community 2009.  ( Skype: insitfx )