It's unlikely, but I also can't say as I recall ever running into a region change setting on any Mac I've ever used. I also can't say as I've ever been looking for such an option, but I do like to poke and prod things. So it is either region free, or more likely, it's set at the factory based on where the unit is being shipped to, and cannot be changed.
Best thing I can suggest, is just popping in a DVD and seeing what happens.
Will my MacBook play a Region 2 DVD as is?