patois.

Inherited from Middle French patois (“local dialect”), from Old French patois (“incomprehensible speech, rude language”), alteration (due to influence of the suffix -ois in words relating to nationalities and languages) of earlier *patoi, a deverbal of patoier (“to gesticulate, handle clumsily, paw”), from pate (“paw”), from Vulgar Latin *patta (“paw, foot”), from Frankish *patta (“paw, sole of the foot”), from Proto-Germanic *pat-, *paþa- (“to walk, tread, go, step”), of uncertain origin and relation. Possibly from Proto-Indo-European *(s)pent-/*(s)pat- (“path; to walk”), a variant of *pent-/*pat- (“path; to go”). Cognate with Dutch pat, Low German pedden (“to step, tread”). Related to pad, path.