A lot of that goes over Rey's head. Orzammar, surface dwarves, it's all stuff she's fairly uneducated in. Yngvi is the first dwarf she's actually run into. Still, at least some of it she clues into and she smirks a little as he explains why he named them, crouching down so she can put the nug in her arms down with his companions, but remaining in that position, greeting the other nugs with light touches.

"Do they understand you, or is that just wishful thinking on your part that the names will motivate them?" It sounds like something that would happen on Jakku. Likely did, for all she knew. There were fights of some kind or another, those who managed to avoid being scavengers pitted animals against each-other. She'd never had the money or the interest to look into it further than hearing it mentioned from time to time.