col*lo"qui*al*ly
Webster's Dictionary (GCIDE)
Colloquial \Col*lo"qui*al\, a. [See Colloqui.] Pertaining to, or used in, conversation, esp. common and familiar conversation; conversational; hence, unstudied; informal; as, colloquial intercourse; colloquial phrases; a colloquial style. -- Col*lo"qui*al*ly, adv. [1913 Webster]
His [Johnson's] colloquial talents were, indeed, of the highest order. --Macaulay. [1913 Webster]