Why is Brussels officially bilingual?

Brussels became an officially bilingual city in 1932. This status was established as part of a broader effort to address the linguistic and political tensions between Belgium’s two primary cultural groups: the Flemings, who speak Dutch, and the Walloons, who speak French.13

Historically, Brussels was a Flemish-speaking city, but social pressure and the prestige of the French language led to a significant shift in demographics, with a large majority of the population speaking French by the mid-20th century. Throughout the 20th century, the Flemish community campaigned for the official recognition of their language in public services and government to ensure equal status and political influence.213

Today, while Brussels remains officially bilingual—meaning all public signs and government publications must appear in both Dutch and French—French serves as the city's lingua franca. This bilingual framework is a legal compromise intended to balance the interests of both language communities within the capital.231