I believe it's more to do with DNS requiring using a subset of ASCII characters. Punycode was devised as a way to encode Unicode characters into this subset of

I believe it's more to do with DNS requiring using a subset of ASCII characters. Punycode was devised as a way to encode Unicode characters into this subset of characters that DNS recommends. https://en.wikipedia.org/wiki/Punycode https://en.wikipedia.org/wiki/Punycode