Original sentence: Brussels (, , and sometimes  by non-Belgian speakers of French; , ; , ) is the capital of Belgium, of Flanders (consisting of both the Flemish Community and the Flemish Region) and of the French Community of Belgium, and it is the headquarters of most of the European Union's institutions, making it the de facto capital of the European Union
Edited sentence: Brussels (, , and sometimes (incorrectly)  by non-Belgian speakers of French; , ; , ) is the capital of Belgium, of Flanders (consisting of both the Flemish Community and the Flemish Region) and of the French Community of Belgium, and it is the headquarters of most of the European Union's institutions, making it the de facto capital of the European Union