[argon81]

I actually took this a step further a few months back and implemented unicode's "Skeleton" algorithm https://github.com/mtibben/tr39-confusables-go

This is useful for example, to ensure that users don't try and spoof each other's usernames. Simply create and store a skeleton string for each username, and keep a unique constraint on it

[zellyn]

That confusables list is a good starting point, although you'll need to make additions, and probably scale back a couple of the over-zealous ones (eg. rn -> m)

I'm coming at this from a comment spam point of view, not usernames, btw.