Registering with language Spanish (espanol) generates 404 error on submission

Whenever a new user selects Language: Spanish (espanol) during registration, a 404 error is given upon submission,. The confirmation email is sent normally and the user is able to activate their account from the email. They are able to login using the username and password created during registration. Other than the 404 error, all functionality appears as expected

The only issue appears to be the 404 error. I've successfully tested selecting the other language options during registration without any issues. Please help with eliminating the 404 error.

Thanks,