So everything displays and functions fine in the help except when run through Google Translate? I’d be checking to see if Google’s got some problems, not RH.
The message here is a security error. The browser blocks an XSS vulnerability that comes up (I suspect) because of the frame handling by RoboHelp.
In your ouptut, simply rename the existing file and paste the RH9 version in the output. At worst, the output won't work (correctly) and you have to restore the original whproxy.js. RH9 and RH11 are VERY different in their WebHelp code. It will give you lots of problems if you try to view the help locally, but with a bit of luck, it might just work on a web server.
@MSCaroline – have you tried experimenting with HTML5 output instead of WebHelp? Does it trigger the same security warnings?