I brought this up last time (https://news.ycombinator.com/item?id=29066760 https://news.ycombinator.com/item?id=29066760) but: https://github.com/reinderien/mi

I brought this up last time (https://news.ycombinator.com/item?id=29066760 https://news.ycombinator.com/item?id=29066760) but: https://github.com/reinderien/mimic https://github.com/reinderien/mimic It applies to other contexts besides code. For our user table we have a mariadb collation on the unicodes confusables list which avoids confusable usernames (treated as already existing).