"Who...what are you?"

[Misutoraru]

Sorry about that..xD
English: "You! Who..what are you?"
German: "What a fool you are!" (translated)
French: "But what kind of human/person are you, then?" (translated)
Japanese: No idea I'd like to know, though!

Having seen 3 of the 4 languages now, my theory is that basically he is questioning us how we can be considered a WoL instead of a WoD after what we did. Because right before his Famous Last Words, he talks about how we basically didn't give a shit about thousands of lives just to achieve something we consider "right". And from his perspective, that totally makes sense

貴様はいったい何者なのだ
more less the same at who the XXXX are you