When Captain Carter refers to Pyrus that he's not a Goa'uld and Jack asks how she knows, she replies 'first clue was his voice'. It's already known that Goa'ulds can use normal human voice, like Hathor did in the episode "Hathor" as well as Carter herself in the episode "In the Line of Duty", when she had the Tok'ra symbiot in her head.
Even though forced to work in a mine under slave conditions (and being covered in dirt), Jack's teeth still gleam snowy-white when grimacing. However, even under the dirtiest conditions, it is possible to maintain oral hygiene. Hundreds of years ago, supposedly primitive tribes-people in Africa kept their teeth gleaming by using a paste made with the ash for fire.
Shyla asks Daniel Jackson if he needs his "glasses". No one on this planet wears "glasses" and the term, "glasses" is an English word and not even universal in N America. Shyla would have no knowledge of the word.
Shyla refers to them as "glass circles", not "glasses"
Shyla refers to them as "glass circles", not "glasses"