Why is the ninth month called September?
"a provincial dialect," 1640s, from French patois "native or local speech" (13c.), of uncertain origin, probably from Old French patoier "handle clumsily, to paw," from pate "a paw," from Vulgar Latin *patta (see patten), from notion of clumsy manner of speaking. Cf. French pataud "properly, a young dog with big paws, then an awkwardly built fellow" [Brachet]. Especially in reference to Jamaican English from 1934.