6
I don't know, I looked at the full version of 2013_1 now and I did not find this user_lang.
This site is in two languages, therefore I use the hack of marcan.
But, I also did not find it here (in the MySQL commands)
So, for me the easiest now would be to remove this insert of user_lang into the database.
Where can I find the commans that insert the data into the database during the registering process?