The word madame is known throughout the world, and everywhere it is pronounced acceptably-except among English-speaking people. It would be said to translate literally as "my lady," but so-called literal translations are usually only mistranslations. Anyhow, the word has no real equivalent in modern English.
Foley, L. (1974). Don't Call Me "Madam". Reading Horizons, 14 (3). Retrieved from http://scholarworks.wmich.edu/reading_horizons/vol14/iss3/2