Some years ago, PBS showed a performance of ‘Dialogues of the Carmelites’ [that’s with an ‘s’] from the Metropolitan Opera in New York. That performance was in English. I had that taped off the TV, but my VCR is not working now and I can’t see it.
A year or two ago, I heard a performance by the Chicago Opera on the classical music station I often listen to; it was on the Saturday closest to the Feast of Our Lady of Mt. Carmel, which is the day before the nuns were martyred. That was in French. But I understood bits and pieces of the words that were sung, because of French being a Latin-based language. I nearly cried at the end, when I heard the ‘Salve Regina’ sung by the nuns as they died!
‘Blanche de la Force’ is a creation of Gertrude von le Fort, who wrote the book Francis Poulenc based the opera on-she never existed.
The best book on the ‘real story’ of the Compiegne martyrs is ‘To Quell the Terror’ by William Bush, an Eastern Orthodox [surprising] from Canada. He met Francis Poulenc’s widow and dedicated the book to her. It’s available from ICS Publications in Washington, DC. Get it-it’s a great book. It gives a detailed background on not only the Carmelite nuns themselves, but on the diabolical nature of the French Revolution.