The stage works of Offenbach (with the two exceptions of the opéras Die Rheinnixen and The Tales of Hoffmann) are broadly referred to as 'operettas' in English references, even though only 16 of them were designated as opérettes by the composer.
Other minor subgenres include opéra bouffon (5), bouffonnerie musicale (3), saynète (2) pièce d'occasion (2) and revue (2).
Theatres in the English-speaking centres used music by Offenbach to create pasticcio during the 1860s and 70s.
Many of these pieces were made to libretti completely unknown to Offenbach.
Vienna also saw examples of re-use of his music, and the practice continued into the 20th century.