Target Categories, get the word block on the error page

[manu13]

Hello,
I am a French user, I have set up https filtering with a transparent proxy, I have also set up in addition to a blacklist a Target categories, it works well, for example if someone searches for the word "por" on google, this blocks the request and displays the name of the list, but I would like to display the blocked word on the sgerror.php page.

Is there a php variable to recover the blocked word?
thank you in advance
good night