Maybe, or perhaps they're told to use formal language at work? I don't know.
Yeah it was fun to learn, but I didn't continue with language studies once we were able to choose more elective subjects.
And yeah, at that age I believe my favourite bands (if I even had any at the time) were Aqua and Spice Girls In my entire life so far I've spent a total of 4 days in any country where French was an official language (ok, so Belgium ), compared to something like 7 weeks so far in German-speaking countries. Even if I could go back at tell the 10-year-old me to pick German instead of French and why, then 10-year-old me would be highly confused and choose French out of spite.
I graduated from high school 10 years ago this year, so in that aspect it is too late. If I could somehow get my hands on high school books then learning would be easier, but I've gotten a small way with the resources I already have
Even worse, you were in a place that had 2 (TWO) official langauges. French and Dutch!
Apart from the fact that English is Brussels' "third official" language,due to the EU that's there as well.