Rick, I tried to translate it on this other language site, and got some rather anomalous results. I then passed it on to our code-breaking analysis team, which includes myself, a dachshund, and a green budgerigar. We think it means as follows:

So, Rick Fielding, I do not know who you are, but I see that you
have humourous enjoyment at the expense of your betters. We French spit
on your pathetic attempts at humour. We laugh disdainfully, not
with you, but at you. You are an obscure person of no importance.
Your music is unremarkable, and your face resembles an old
hamburger which has been lying in the sun too long. We hope that you will soon be attacked by a local troop of motor bike gang members and
tossed into the gutter where you belong!

A fan of Avrl

Watch out for musketeers with pencil-thin mustaches when you walk home late at night, Rick!