dozy, thanks for the translation of that section of the report.
jcgeant, the answer to your 'bizarre' question is that the wife of the PF is back in the cabin, and they both are returning from a vacation in Brazil. The PF had apparently not previously flown with the captain before this flight. That's why the captain asks if he is qualified.
(You can check the passenger list and match her name with the name of the PF.)
Now one can ask whether it was prudent for the captain to take his rest while the flight is transiting a turbulent section of the ITCZ, and turning the flight over to a junior FO with whom he has never flown before.