Nationality and ethnicity are often the same. Considering that she is a prospective heir to the Nevarran throne I'd assume her ancestry is Nevarran.
Nationality and ethnicity are often different. Why make a claim as to what Cassandra's ethnicity is when we have no way of knowing?
True, but that's one more thing it has over Spain. Isn't Rivain the Spain of the DA world?
I'm going to guess that you've misunderstood the conversation.
No one has claimed that Cassandra is hispanic or that Navarra is Spain. We're talking about someone on tumblr who thought Cassandra was white washed and wondering what non-white REAL WORLD race or ethnicity they thought she might be.
In this case, ethnicity and nationality are the same.
You can't just make something up and state it as a fact. You have no idea what ethnic groups the people of Navarra fall into.
We don't say people from Ferelden are of English ethnicity, we say they are of Ferelden ethnicity. Our races don't exist in there world.
No, *you* say Fereldens are of Ferelden ethnicity because you've headcannoned that nationality and ethnicity are the same thing in Thedas. I'd say that they're of Clayne or Almarri ethnicity, but that's only a guess on my part.
Likewise, I'd say that Navarrans are Planasene ethnically, the same as the other Free Marchers. But that's a supposition on my part, not a fact.