Thanks to Leonardo De Luca, session 4 is now available in spanish
Also, thanks to:
ZeD who pointed out a bug in session 2 and wrote a sphinx config file (works very well!)
Emanuele Rampichini who pointed out a bug (which I have not fixed yet)
Simon Edwards who posted about this series in his blog and pointed out some differences if you want to use PyKDE instead of PyQt.