Questions about managing user accounts

[sirgazil]

I know that you can create new user accounts by specifying them in the 
operating system configuration as indicated in the manual 
(https://guix.gnu.org/manual/en/html_node/User-Accounts.html#User-Accounts). 
But I can't find answers to the following questions in the manual:

1. How do I delete users completely?
2. How can I create users that use different languages?

Regarding (1), when I remove users from the system configuration, their home 
directories are left behind, and this seems to create conflicts when I create a 
new user with the same credentials and home directory as a previous user. With 
conflicts I mean that I can't login with those kinds of users (even if I reset 
passwords with passwd).

Regarding (2), I mean users whose desktop interface should be displayed in a 
different language than the that of the locale specified in the operating 
system configuration file.


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