The protection level definition of CHANGE_CONFIGURATION has changed in Jelly Bean 4.2.
You can grant permission manually using the 'pm' command if you have access to development tools.
The MoreLocale 2 app could get the permission automatically if you have SuperUser privileges on your device.
Through this app, you will be able to select from a variety of locales.
You can use the custom locale function in the menu if your locale does not appear.