Here's a breakdown:
* French is the official language in the Wallonia region, and it's spoken by the majority of the population there.
* Brussels, the capital city, is officially bilingual with French and Dutch, although French is more widely spoken in the city.
* The Brussels-Capital Region is a separate region within Belgium and is considered a French-speaking area.
While Dutch is the official language of the Flanders region in the north, it's common to encounter people who speak French in Brussels and Wallonia.