The default value for the options of the keyboard layout is XKBOPTIONS="${XKBOPTIONS}".  It is based on the currently defined language/region and the settings in /etc/X11/xorg.conf.
Azal amezwer i textiṛiyin n tneɣruft n unasiw d XKBOPTIONS="${XKBOPTIONS}".  Tebna ɣef tutlayt/tamurt tamirant yettusbadun akked yiɣewwaren deg /etc/X11/xorg.conf.