> On Dec 9, 2020, at 09:38, Stephane Bortzmeyer <stephane at sources.org> wrote: > > There is an implemention of Punycode in every standard library, > whatever your language. There is also GNU Libidn (idn): # idn --quiet r?ksm?rg?s.se bl?b?rgr?d.no xn--rksmrgs-5wao1o.se xn--blbrgrd-fxak7p.no https://www.gnu.org/software/libidn/manual/html_node/Invoking-idn.html