The text from the page when you are typing a reply to a message:
| IMPORTANT: Do not send fake system reports of any kind including fake battle and peace offer reports. Do not use any form of m*** messaging script to send mass messages to other users in Cyber Nations. Do not use any form of software with this messaging system.|
Are you running a word filter on your browser? I don't have this problem on my end.
You probably have the word filter on anything that contains those three letters, if I had it set on loose block, hello would be h***o, etc.
So if you set the word blocker to exact matches only that should alleviate the issue. Or at least that's how the Invision Free word blocker works.