Languages of Belgium
Before the federal structure and the language legislation gradually introduced in the 20th century, French was generally the only language used by public authorities. For example, the Dutch version of the Constitution has enjoyed equal status to the original French one only since 1967, and the German version only since 1991.
Of the inhabitants of Belgium, roughly 59% belong to the Flemish Community, 40% to the French Community and 1% to the German-speaking Community, though these figures relating to official Belgian languages include unknown numbers of immigrants and their children speaking a foreign language as primary language, and of Belgian regional migrants which may be assumed to largely balance one another for natively French and Dutch speakers. Though the standard form of Dutch used in Belgium is almost identical to that spoken in the Netherlands and the different dialects spread across the border, it is often colloquially called "Flemish".
Football in Belgium
A Belgian club's name usually includes the name of the town where the club plays as well as a prefix and/or suffix. Since Belgians speak three languages, French and Dutch being the main ones and German being the third official language, Belgian teams may use either language as the basis for their names. For historical reasons, many Flemish clubs changed their names from French to Dutch between the beginning of the 20th century and the late 1960s. Additionally, many clubs have experienced frequent name changes. Reasons for these include a language change, a merger, an anniversary, etc. Because of the numerous mergers between Belgian clubs, team names sometimes combine several town names (such as K. Beringen-Heusden-Zolder or Sporting West Ingelmunster-Harelbeke) which reflect mergers. In recent history, clubs representing immigrant communities have come into existence and sometimes use names that are in neither of Belgium's official languages (the now defunct clubs Türkgucun Ozburun and Türkiyemspor Zaventem, or the still-existing Agrupación Oviedo-Asturiana, existing only in a league outside the Belgian FA now, from Brussels, being examples).