Two Languages? English and Vulcan.

[A.V.I.A.F.]

Uhmmm...no, this is not obvious at all, however much your assumptions please you.

"Are thee Vulcan, or are thee human?" is what is spoken in the episode. That is incorrect English...no assumption there. According to you Sturgeon wrote this without any other input or rewrites from anyone (your remark about "the writer (singular)" which was very cute by the way). So then either Sturgeon wrote it incorrectly, or Lovsky read the lines incorrectly. You claim to have the script, see for yourself. If Sturgeon wrote "Are thee Vulcan, or are thee human," then he simply got it wrong, accept it and move on. Please drop the cute comments already and take the time to read what has been posted before you start doling out the attitude.

Eh...as I said before, T'Pau is so racist, I can't imagine her being concerned about being that fluent in the Human Language. Why would someone so racist spend that much time learning such command over the language to catch something that obscure or intricate?

Why would she use a form of English that is not only archaic in her own time but in the 20th century as well? If the writer wrote T'Pau's lines that way for the purposes of creating a sense of antiquity, then he should have at least got it right. To suggest that the writer purposely has T'Pau speaking an archaic form of English (which presumably she would not have heard during her own time) and then to have her speaking it incorrectly to convey her lack of concern or disdain for the language of Terrans is quite a stretch.

I invoke Occam's Razor, "the simplest explanation tends to be the correct one." Somebody dropped the ball, either the writer, the actor, or someone else involved with this episode.