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
European institutions in Strasbourg in Brussels and Luxembourg city. The split arrangement has caused financial, environmental and practical difficulties, with the Strasbourg location usually (though not universally) being cited as the extraneous location rather than Brussels. The École nationale d'administration, founded in 1945 in Paris, was moved to Strasbourg by decree in 1991 and permanently established there in 2005 (although the headquarters had been transferred from the start, the students had to spend half of their annual curricula in either city until that date). In the course of its refocusing on European governance, it merged with the Centre d'études européennes de Strasbourg (Center for