Body language also will help
The other elements probably can translate for the magi, and maybe the demoness,(is she her? Alex is so i would assume, but she might not be) oh and maybe the androids could figure it out and whip up a translator.
One idea would be to hook up the vr system to them, as it scans brain waves with enough accuracy to let you talk in the world it could be considered mind reading and allow telepathic communications, this could bypass language altogether. So slap on one of those chip and let them talk that way.
So, is there anyone present in this situation that actually understands what they’re saying? The only possible person I can think of would be PenPen.