The term "Osco-Umbrian" refers to a group of ancient Italic languages spoken in central Italy, primarily by the Osci and Umbri peoples. These languages are part of the larger Indo-European language family and were used before the spread of Latin during the Roman expansion. Osco-Umbrian languages include Oscan and Umbrian, which are known from inscriptions and texts dating back to the 3rd century BCE. The study of these languages provides valuable insights into the culture, society, and history of pre-Roman Italy, highlighting the diversity of languages that existed in the region before the dominance of Rome.