"Ma'aleca'andra."

That's why. Also, she's so used to it it's not novel for her anymore and she didn't think about it.

"White Martians aren't terribly friendly. They went through something similar to the Holocaust before the species began to die out completely. I can't say if one or the other is worse, because Manhunter and his protege are the only ones left and it would be foolish to base an entire race on one being."