里さと言こと葉ば

方ほう言げん
方言 is the general term for 'dialect', while 里言葉 specifically refers to rural or countryside dialects, often with a nuance of being old-fashioned or local.
隠いん語ご
隠語 is a general term for 'secret language' or 'jargon', while 里言葉 in its second sense refers specifically to the historical sociolect of Edo-period red-light districts.

Built from

里さと+言こと葉ば

Written forms

里さと言こと葉ば
Standard kanji spelling.
里さとことば
Mixed kanji-kana spelling; less common but still used.
里さと詞ことば
Rare variant using 詞 instead of 言葉.

Etymology

A compound of 里 and 言葉. Here 里 may mean either a village or countryside, yielding “rural speech,” or an entertainment quarter, yielding the specialized speech of Edo-period pleasure quarters.