Aform of Latin used in daily conversation by ancient Roman, as opposed to the standard dialect, which was used for official documentsis called __ Latin

Vulgar latin

Explanation:

Vulgar Latin (in Latin, sermo vulgaris, "common speech") is a blanket term covering the vernacular dialects of the Latin language spoken mostly in the western provinces of the Roman Empire until those dialects, diverging still further, evolved into the early Romance languages. The world vulgar means common.