No, fake accents. Because he has to translate the words into his home alien language, then back into the right language, and fake accents throws him.

Like my real French is abysmal, but when he's around with his ship, to anyone who speaks French naturally, I sound native French. And to me, they sound native British. Once you add in fake accents, it's like psychic static, I think. He won't admit that's why. He acts like he's just offended, but I've seen how the others react, so yeah. Pretty sure.