Leaving aside Basque, it’s assumed that Spanish speakers use the same language. In principle, yes, but it’s not a given, so to get around Pamplona and interact with locals, it wouldn’t hurt to familiarize yourselves with some local expressions. We’ll use a pedagogical method by recreating a practical conversation:
Hello, good morning.
Hey, how’s it going? Just taking a stroll this morning?
Good, we’re not from here and we’re looking for somewhere to have some tapas. Can you recommend a place?
I’m sorry, mate, but there aren’t any tapas here.
Oh. So where can we get something to eat?
Oh, well, you can have a great time drinking in San Nicolás. And do you also have a menu with a well-composed salad or a roasted pig?