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 At the founding of the European Coal and Steel Community (ECSC), the states could not agree which city should host the institutions of the new community. Brussels was widely preferred, but was vetoed by Belgium which insisted on Liège. Because of the impasse, Luxembourg was chosen as a provisional choice for all but the Assembly (Parliament), which was to be based in Strasbourg. Two further communities were created in 1957 and again a provisional agreement laid out that the Assembly would meet in Strasbourg, the Courts would meet in Luxembourg, and the Commissions and Councils would be split between Luxembourg