During the Debian installation process we are offered to setup our keyboard layout and distribution; sadly my favorite one is not listed as one the possible options.
I would like to be able to set it up as English International with AltGr dead keys.
This is something I have to do as a post-install setting by running the next command:
su -c 'localectl set-x11-keymap us thinkpad altgr-intl'
This sets the layout as English US; the model compatible with my Lenovo ThinkPad T440p; the variant as Dead keys via AltGr, which means I can input characters as á or ñ by just pressing: AltGr + a or AltGr + n respectively.
pionen@lilit:~$ localectl System Locale: LANG=en_US.UTF-8 LANGUAGE=en_US:en VC Keymap: n/a X11 Layout: us X11 Model: thinkpad X11 Variant: altgr-intl
This way I can continue using the English US keyboard layout when writing in either English or Spanish without having to change the variant or physical layout.