Simon from Imagine Peace says,
If any Boing Boing readers would like to contribute and don't see their language included, then please ask them to send us a translation so we can make a poster for their language. If they could format it like this (below), that would be most helpful:
WAR
IS
OVER!
IF YOU WANT IT
Happy Christmas from John & Yoko
Yoko Ono also invites tributes and memories here. After the jump, video with John and Yoko: WAR IS OVER (if you want it).