Re-read the post from Trask that started the thread. No mention of immigrants, implicit or explicit, is made. Trask's argument, as I read it, is that english should be the only language on credit card readers. Period.
My wife is a non-native english speaker--hell, she speaks english better than I at this point and she's only been here about 9 years. I assumed from an avatar named Kiwi that you were a New Zealander so I apologize if I offended with my crack regarding being a non-native speaker.