UnanimousD

SOLUTION: When you're on planet M4-78, there's a droid ES-43 who says he's having trouble communicating with another droid nearby. This other droid is simply labeled "Droid" with no designation or role listed. If you ask HK-47 to speak with them, "Droid" will understand, but only if Droid Interface is one of HK's feats. ...so yes, you need the Restored Content Mod, and the M4-78 add-in for the mod.