Add url_CODE and email_CODE

[leonardo-dgs]

Some websites have a different URL, and sometimes even a different email, for each language.
It would be useful to have url_CODE and email_CODE for language specific URLs and emails.
The url and email fields will continue to be the default, when the URLs and emails are the same regardless of the language.

[tupaschoal]

The url_CODE already exists, we would just have to add email_CODE, but I'm thinking whether this would be very frequent and if people would remember to use it.