[xnorswap]

I've worked with a few dyslexic developers over the years.

The answer is to just be vigilant, patient, and double-check their work.

Many IDEs support spellcheckers, so you could bump up the warning level on suspected spelling errors.

I've only rarely seen them cause run-time issues, but I guess that would be more significant in loosely typed languages where they could slip through to runtime errors more easily.