I found this HP Prime CAS document written by the XCas people.

[webmasterpdx]

I tried using other translators, but they all had limits. I tried other file formats but google docs wouldn't open .odt, .doc or .htm file formats. I then tried breaking it into 6 pdf files, but that wasn't enough as hprime2.pdf is 557 pages long.
I think HP should really make the effort and convert these kinds of docs into all supported languages and put them all together into a user manual. I'd buy a hard copy of that book....
-Donald