He vaguely recognizes the word 'captain;' he's heard it before somewhere, though he can't remember what it means. The way she emphasizes it makes it sound like a title, though, or at least a formal component of her name, so he'll use it. Titles are important to Vulcans, and there's no reason to be openly disrespectful.

Her smile, while reserved, is still much more open than Saval's accustomed to, and he responds with an arch of his eyebrow. He's heard stories of how effusive and emotional Sarek's wife used to be, before she learned how to comport herself like a proper Vulcan. It must be a human thing.

He looks over to see where she's pointing, and it takes him a moment of analyzing the inflection of her words to figure out what she's asking. For a second, he thinks she's pointing out something about the tree, but there doesn't seem to be anything odd about it. If she's asking about it, she must know that he can't really respond, other than to tell her how to say it in Vulcan, so maybe that's what she wants to know. He's not sure why, but he'll humor her. It's nice that she wants to learn a few words of his language. "Indukah," he says. It translates as 'oasis plant.'

"I hope that your companions are not disrupting anything," he adds, as long as she can't understand him.