I'd usually say, "oh, how convenient that Kashu is speaking japanese so the two earthlings can understand her"... but she's probably doing it intentionally for that specific reason. So its good.
They just assumed the captain allowed warcrimes even tbough they all received the same orders? They can track Birdy and the others but not Neith? How did Neith think this would turn out if her two idiot colleagues weren't going to corroborate her story? I used to complain Birdy was too stupid to be a detective but now I see it's the entire Federation that's brain dead. She never had a chance.