I don't read French either so am not much help, except to say that the trains can go out without warning.
Back in 2010 my husband, Ian, was due to catch the flight back to Australia from Nice. To make the flight he was going to catch the local train from Pau. When we arrived at the train station we were greeted with the news that there were no trains running to Nice because the drivers were out on a wildcat strike. The once-a-day TGV to Paris was the only train running. It was just about to pull out of the platform. The station master grabbed Ian and thrust him on the train, saying he could get to Nice via Paris.
As it happened, Ian made some phone calls on the train and managed to change his plane ticket to leave from Paris instead of Nice. Which was a good thing because nothing was running from Paris that would have got him to Nice in time.
Which is why we always leave ourselves an extra day to catch the plane. It only seems to happen in France.