My white paper on REST in Delphi 2010 is now a available in a fourth language (after English, French, and German). As for the others, there is a site where you have to register (giving Embarcadero your contact information) before you can download the document. The web site is:

Funny to see my profile, which (of course) I cannot read:

BTW, also Bob Swart paper on DataSnap has been translated to Japanese.