My remarks were spurred mostly from noticing that while playing an Outlander I still got [Baldurian] responses which wasn't something I would have expected. It's the kind of mismatch that sounds like a good story.
I thought about Outlander in particular. It can be explained that you are an Outlander in a sense that you weren't born in Baldur's Gate, but settled there and spent a significant part of your life in the city to be considered Baldurian. At the same time, your origin still gives you the appropriate skill proficiencies.