What is "poitevin-saintongeais"

Poitevin-Saintongeais (or locally Parlanjhe) is an older classification for the two languages/dialects now officially (in France at least) classified separately as Poitevin and Saintongeais. This classification is a subgroup of the Romance languages, and the Oïl language group. The dialects of this language are spoken in the regions of Poitou and Saintonge.