Question

Why did French become a part of the old Belgium that only speaked Flemish?

Answer 1

Answer:

When Belgium became independent from the Netherlands, they were mad at the Netherlands and the French took advantage of that by forcing their culture upon the Dutch speaking Flemish. That is the simple explanation.

Answer 2

When Belgium became independent from the Netherlands, they were mad at the Netherlands and the French took advantage of that by forcing their culture upon the Dutch speaking Flemish. That is the simple explanation.

More to say, napoleon fault for these happenings.