Languages of the European Union which is understood by 51% of all adults, while German is the most widely used mother tongue, spoken by 18%. All 24 official languages of the EU are accepted as working languages, but in practice only two – English and French – are in wide general use and of these English is the more commonly used. French is an official language in all three of the cities that are political centres of the Union: Brussels (Belgium), Strasbourg (France) and Luxembourg City (Luxembourg). , the official languages of the European Union, as stipulated in the latest amendment of "Regulation No 1
Institutional seats of the European Union for use by the Eurozone. Institutional seats of the European Union The seven institutions of the European Union (EU) are seated in four different cities, "viz." Brussels, Frankfurt, Luxembourg and Strasbourg, rather than being concentrated in a single capital city. The EU agencies and other bodies are located all across the union, but usually not fixed in the treaties. The Hague is the only exception, as the fixed seat of the European Police Office (Europol). Over the years, Brussels has become the principal seat, with each major institution and now the European Council being based wholly or in part there,