When a top domain only allow a certain set of characters, like #Norid for .no-domain https://www.norid.no/en/om-domenenavn/regelverk-for-no/#3.-General-requirements-for-the-domain-name---what-can-be-applied-for%3F allowing only:

á
à
ä
č
ç
đ
é
è
ê
ï
ŋ
ń
ñ
ó
ò
ô
ö
š
ŧ
ü
ž
æ
ø
å

If there exist a domain `vørterøl.no`, would it then be considered rude (or not allowed) to add non supported characters in sub domains like:

ルートビア.vørterøl.no

?

#IDN #unicode #rfc5890 #rfc5891 #rfc5892 #rfc5893 #rfc5894