Edit. Preference country and language. However in legal spies this should be selected on install as well.
No Photoshop CS5 and Photoshop Elements are separate programs.
CS5
You have to exchange the disk via Adobe or to buy a new version. See related link for more details.
yes.
Adobe Photoshop is not multilingual. You must buy or contact support for localized version.
Photoshop CS5
Photoshop CS5
Yes, you can upgrade from Photoshop CS3 (or earlier) to Photoshop CS5 Extended, no problem.
cs5 is better
In Extended version you have 3D Tools to work with 3D Objects.
Adobe Photoshop CS5
Adobe photoshop CS5 (extended)