Castelmezzano is a Romance variety spoken in Castelmezzano in the Province of Potenza in Italy. It differs from surrounding Lucanian and Gallo-Italic dialects in having an Eastern Romance vocalism (the same merger of Latin vowels that the Dalmatian and Romanian languages do). It is therefore sometimes classified as Eastern Romance. However, there is evidence that this type of vocalism was once characteristic of most of southern Italy.
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Castelmezzano". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- Michele Loporcaro, "Phonological Processes", in Maiden et al., 2011, The Cambridge History of the Romance Languages: Volume 1, Structures