The Zero 2W is cheaper and pretty much the same spec as the Pi 3.

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You should be able to use the Compose key on Linux for easy typing of accented characters. eg. Compose ’ e = é

Note that the QL core is already available (although an improved version is in the works), and the C64 core will also be available to KS1 and KS2 machines.

I found this handy snippet to enable these keys in GTK 2 and 3 (not sure of the equivalent for GTK 4 but I guess that’s the one which has been updated anyway): https://forum.colemak.com/topic/1438-dreymars-big-bag-of-keyboard-tricks-linuxxkb-files-included/#p10012

Unfortunately I’ve found this whilst I’m not at the right computer so I haven’t been able to test them.

Edit: I tested this and it doesn’t appear to have helped.

MacOS should use CUPS - I believe Apple developed it or at least did some major work on it.

Yep, I’ve never needed to ask a question on Stack Overflow as everything I’ve searched for has been answered already… or I’ve looked elsewhere for the answer as I’m not allowed to upvote, downvote or ask questions on it anyway due to lack of karma (or whatever they call it). No wonder it’s in decline if nobody new is allowed to contribute, and every new question is closed as a duplicate.

Yep, SANE is great.

As a non-free alternative, VueScan is pretty good too.