I'm forced to run
setxkbmap -option grp:switch,grp:alt_shift_toggle,grp_led:scroll us,ar
every time I need to switch to writing in Arabic. After entering this command, I can use the language switcher in the taskbar (I'm in LUBUNTU).
If I re-boot, the language switcher no longer works - the alternative would be to hit ALT+SHIFT, but that's gone too.
Is there any way I can fix this? For some reason, in Lubuntu the Preferences>Keyboard options are very limited.