At the same time as doing this, Shishou also teaches Julie the Human Language. Surprisingly, she can understand it as long as it's just some basic words. Thinking about it, since she had spent a number of years in the Central Continent with her parents, this much is natural. It might be because of this that teaching her is really simple it seems. That merchant lied. No, since he had no reason to lie, it might be that Julie simply hadn't spoken it in their presence.