Just as a question, did you recently equip her with a head slot item? Even though a Togruta does not show those, their voice will still be modulated if the headpiece does modulates the voice. One thing that has worked in the past for it, is to hit c, hit the little armor looking icon to the right of that window, and checking 'hide head slot'. If you can't do that, you might have to find a different headgear to equip her with.
