On many different times I have seen Fedor Emelinanenko carry out full conversations in English. But as you saw in Affliction he used a translator. Now I will admit his English is pretty bad. It really is hard to understand at times. But Fedor is notorious for his good sense of humor. So if he using a translator as a joke or is it to make sure ntohing is lost through his bad english.
YouTube - Fedor vs. Mark Coleman - Backstage 'Roid Rage?
He has a few conversations in English in that movie, his accent is very thick, but it is english lol