Languages of Belgium
The Kingdom of Belgium has three official languages: Dutch, French, and German. A number of non-official, minority languages and dialects are spoken as well.
Dutch in Belgium
Based on differences sources, the number of Dutch speakers in the Brussels-Capital Region can currently be estimated at 5 to 8 percent.
In 2011, on average 7% of the Brussels customers of the largest Brussels telecom operator Belgacom received their invoices in Dutch, 91% in French and 2% in another language. 
The number of Dutch-language invoices turned out to be considerably higher in the northeast of the region than in the southwest (8 to 12% versus 3 to 5%).
Dutch is the official language in Flanders, but there are a number of Flemish municipalities in the Brussels Periphery with a French-speaking majority, which are officially Dutch-speaking with French-language facilities.