translate English to French: However, for those counterparties which were not able to set up such facilities themselves, some national central banks may agree to provide conversion facilities which would allow banks to submit their payments in the national monetary unit.
Cependant, certaines banques centrales nationales peuvent accepter de fournir des systèmes de conversion aux contreparties qui ne pourraient pas s'en doter, permettant ainsi aux banques d'envoyer leurs paiements exprimés dans l'unité monétaire nationale.