Here's a gaffe. The author says that Belgium has large 'Flemish' and French speaking populations, but then when he talks about Brussels he says there are large

Here's a gaffe. The author says that Belgium has large 'Flemish' and French speaking populations, but then when he talks about Brussels he says there are large Dutch and French speaking populations. In at least one table he lists Dutch and Flemish separately. Is he suggesting that Dutch speakers in Brussels and Dutch speakers in Flanders really speak a different language? :-D