Switching the forum language by using flags [3.5]

[Bellinis]

On my board we use two official languages. Registered users can change their preferred language through the CP and guests can use the language drop-down menu on the bottom of the page.

Since the drop-down menu isn't very guest-friendly, I would like to add two (or more) language flags somewhere on my page (probably in the menu). Does such hack already excist ? (@ vbulletin.com they told me a hack probably already excists here, but I couldn't find it :disappointed: )
Can anyone point me in the right direction?

Thanks a lot!