She isn't trying to come across as not foreign and as informed about where exactly she is because that's frankly a lost cause and it sounds exhausting. And likely to lead to her being notably less informed.
The situation about taxing is- odd. How exactly are the nobility set up here where taxing someone else's village would be the kind of thing you had a talk about, rather than a murder about? Some sort of situation where there are a small number of Special People and she's coming across as a member of that class, and the addition of another Special Person would be worth, what, giving up immediate control over a village's tax revenue for?
And there's that emphasis on "not far". Nikola is trying to emphasize that if she steps out of line there'll be consequences? That she's got a lady who will protect her? That kind of makes sense, it's the basic structure of feudalism, or, well, the ostensible nature of it even if the reality often works out differently. Is this the kind of place where random knights roll into town and "tax" the local population, by which she means robbing them blind?
At any rate, she nods at the bit about taxing and asks the obvious follow up.
"Crin Ilemvich is where?"
If she doesn't want to immediately talk to the local nobility she can consider that fact later, right now she doesn't want to break character. Partially just because it gives her an obvious next thing to say, really.