Thank you Rick.
Can I just add to the line:
[] $ubbt_lang['PASS_BODY'] = "Someone from the ip address '\$ip' registered the Login Name '\$Loginname'. The password for this Login Name is '\$pass'";
[/] and can I use straight html like [] <a href=page.html>link</a> [/] or will I have to escape characters with back slashes?