I have no idea what they are saying. I always tell them to speak English or German then they continue to ignore server's rules about English or German only. Someone said that Rage and Aimbooster were insulting them in their Russian language. If you look at his chatlogs, he has a lot of blank spots because the script cannot record Russian characters.
Rage_Da_K1ngguin's chatlog: http://stats.pb-clan.de/chatlogs?pid=44054
See the attachment below: