[arch-general] display manager dvorak recognition failure

[message]

On 2014-03-17 22:59, arch-general-request at archlinux.org wrote:
> ------------------------------
> 
> Message: 2
> Date: Mon, 17 Mar 2014 18:39:58 +0000
> From: message <letter at openmailbox.org>
> Subject: [arch-general] display manager dvorak recognition failure
> 
> Readers,
> 
> Initially lxdm, gdm have been installed, but neither recognise a dvorak
> keyboard. How to configure the graphical display manager so that a user
> can specify the keyboard layout before to enter sign-in credentials?
> 
> --
> digest-mode subscriber; please cc to maintain message thread
> 

How to add language options to the graphical display manager sign-in 
window, so that user A can sign in using qwerty and user B can select 
the option to use dvorak and another language?