For Ω and other rarely used symbols, I just type: <Ctrl>+<Shift>+U 2126 <Space>. Works like a charm in pretty much any program and keyboard layout. For the mo

For Ω and other rarely used symbols, I just type: <Ctrl>+<Shift>+U 2126 <Space>. Works like a charm in pretty much any program and keyboard layout. For the more common acute/grave/.. letters, I use setxkbmap -layout latin,<local layout> -variant ,qwerty -option grp:switch,grp:alt_shift_toggle Then I can use the nice us keyboard without dead keys for programming and access the local layout by holding <AltGr> (right alt) for local characters (usually via localized dead keys).