This chapter traces the evolution of the term parlamento in its meaning as Hispanic-Mapuche gathering or assembly during the colonial period, as derived from the original Mapuche concept of coyag or coyagtun. A review of the main bilingual sources, i.e., grammars and translations, is made in order to register these lexical uses. We relate the results to the evolution of the parlamento itself as an institution for the negotiation and to the historical context in which the old colonial order is dismantled and new policies are established by the Chilean State vis a vis the Mapuche population and territories. We hypothesize that as a result of these new policies, the coyag[tun] = parlamento equivalence is abandoned.