What are you?

Now I'm back home in The Hague after a very smooth flight. It feels quite good to be back again, and I was greated with tropical heat - always nice! I noticed on the plane that people started watching me as I was changing my Swedish sim-card to the Dutch one. I guess people have a hard time categorizing me when I'm traveling this route - Dutch or Swedish? I was reading some study material in English too, so people really had no idea which language to adress me with. One man even asked me what I was doing and what language I spoke. He was Swedish and said he just had to ask because he was so confused after watching me for a while. It's always fun to puzzle people.