Regex "word" characters may match Unicode characters that get canonicalized to one of the regular characters too with /ui flags: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Regular_expressions/Character_class_escape#w
/\w/ui.test(String.fromCodePoint(i)) && log(i)/\w/ui.test(String.fromCodePoint(i)) && alert(i)