On mIRC 7.25 (Though on all versions of mIRC 7 I have noticed this) if I have UTF-8 decoding/encoding turned on, I can see foreign text, but if someone has a foreign character in their nickname, It's like the nickname isn't on the server at all. /whois, /query, etc. does nothing.

If I turn off UTF-8 support, I can't see the foreign text in the channel, but I can /whois /query and kick the nickname with these characters.

I know an option would be on the network to ban the use of all ASCII characters in nicknames, but this isn't ideal. I should be able to see the foreign text in the channel, as well as interact with the nickname containing foreign text.