As I understand it, all layouts borrow advanced keyboard shortcuts from the English layout.
But for some reason, after deleting all the lines from the /usr/share/X11/locale/en_US.UTF-8/Compose file and restarting the X, I can still type “☹” in three clicks.
/etc/X11/xorg.conf: … Section "InputClass" Identifier "keyboard defaults" MatchIsKeyboard "yes" Option "XkbLayout" "us,ru" Option "XKbOptions" "grp:caps_toggle,grp_led:caps,compose:ralt" EndSection … /usr/share/X11/locale/ru_RU.UTF-8/Compose: include "/usr/share/X11/locale/en_US.UTF-8/Compose"