Equivset
Equivset is a library for detecting visually similar UTF-8 characters.
It is similar to the Unicode Consortium's confusables.txt but has some significant differences.
confusables.txt lists character pairs that are visually identical or nearly identical, for example, Latin "A" and Greek "Α" (alpha).
Equivset, on the other hand, is much broader, including pairs that merely look similar, for example, "S" and "$".
Another difference is that equivset only includes letters and punctuation.
It does not include symbols, emoji, or graphical elements.
It is used at Wikimedia in the AntiSpoof and AbuseFilter software to determine if two characters are visually equivalent.
Tsu-liāu
The library provides its dataset of equivalent set of characters in a standard JSON format and a plain text format (browse files)
It also provides an access library for PHP.