The Analecta Sanctae Hildegardis, in Analecta Sacra vol. 8 edited by Jean-Baptiste Pitra (Monte Cassino, 1882)
contains a large number of sermons attributed to Hildegard. I know of no current English translations of the complete sermons and am unaware of any efforts by the CCCM to produce a critical Latin edition.
Thefore it would be another fun project to produce a parallel translation of these works.