Babble-Fish-2.2

From WowAce Wiki

WARNING: Cross-faction communication is an EXPLICIT VIOLATION of the WoW Terms of Use, section 5.B.10. Do not use this addon if you value your WoW account. Notice that it's not the addon itself that will put you at risk. The very act of communicating directly with a member of the opposite faction inside the game world is what will get you banned, regardless of the means.