Providing a mapping from utf-8 to ASCII is easy, e.g. punycode. The problems arise when it comes to things like checking equality of two identifiers, as it beco

Providing a mapping from utf-8 to ASCII is easy, e.g. punycode. The problems arise when it comes to things like checking equality of two identifiers, as it becomes non-trivial in general Unicode: https://unicode.org/reports/tr10/ https://unicode.org/reports/tr10/