'We're trying to spend more time in the South of France, because our kids have a more normal life there,' said Pitt.
He also admitted he's still struggling to master the language.
Security around the house will be improved hugely, to include a surveillance centre, spy cameras, alarms, and infra-red sensors.
The property comes with a vineyard, swimming pool, moat, lake and forest, and a three-mile long driveway up to the main house.
The cascading stone-walled terraces have been replanted with 13 different varieties of olives, and there are 20 fountains and aqueducts.
The globe-trotting couple will split their time between France and their homes in California and New Orleans.