With our DS we had a choice between science club (which he loved!) and Footabll club ( which he was desperate to do!) Both at same time, so forced to choose. Gave him the choive, mentally willing him to do football, becuase although personnally I find science vastly more interesting than football, and it is very incovenient to get the kit ready etc he was 6 like yours and I think the physical exercise and interaction with others in more important at that age.
On the French thing - i have a degree in French, but did not start learning till I was 8, and that was never a handicap - I was eager for DC to learn as early as poss, so they did from the age of 3, and by the age of 8 when my eldest still couldn't ask for an ice cream in French, I admitted defeat, decided it was a waste of his time & my money and they can learn languages later - if they ahve the inclination...!