TutWD_FlightList in Spanish

When I run the TutWD_FlightList, the result list have all the labels in Spanish.

1. I was surprised that the tutorial could change languages. The label property text is set to "<>", so I guess it gets the label strings from the RFC call?

2. Why Spanish? I NEVER set any language choice to Spanish (as I don't understand it). My native language is Swedish and I think I have chosen English wherever possible, concerning Developer Studio and this tutorial.

Note: I think that Sweden = SE and Spain = ES, could that be of any significance?

3. How do I set preferred language for my J2EE session?