There's definitely no taking those words in the wrong context for Inigo. Although that's mostly since he seems to have no idea what they mean. He stares at her for a moment as he wrecks his brain to try and find any clue as to what they could mean. She says them as if they are very natural, after all, and the last thing Inigo would want to do is look like a total idiot in front of a beautiful woman.

"Excuse me, milady. I hope it's not a terribly foolish question, but.. what exactly are these 'Beorc' and 'Laguz' you speak of?"