Article 21 of the Treaty gives every citizen of the Union the right to write to the institutions in one of the European Union languages and have an answer in the same language.
Tugann Airteagal 21 den Chonradh an ceart do gach saoránach den Aontas scríobh chuig aon cheann de na hinstitiúidí i gceann de theangacha an Aontais Eorpaigh agus freagra a fháil uaidh sa teanga chéanna.