 In the following decade his reputation spread from the Parisian musical world of Versailles, where as "Langlois", the spelling preferred by his son and grandson, he gave clavecin and fortepiano lessons to Queen Marie Antoinette.When the baron de Breteuil formed the École Royale de Chant et de Déclamations in 1784, Langlé was entrusted with teaching singing, a position he retained until the institutional changes that came with the French Revolution.With the creation of the Paris Conservatoire in 1795, Langlé was instituted as librarian, a place he held until 1802.