The reverse is solved with a single button activating the default qwerty layout? The direct with family is similar - you can have an extra layout installed So

The reverse is solved with a single button activating the default qwerty layout? The direct with family is similar - you can have an extra layout installed So the leaves even fewer cases where you really have to switch (but unfortunately not 0, no easy mechanisms to just easily switch to a some downloadable layout named after you on the fly at any computer)