In light of the theory of language services and industrial convergence,this paper examines the convergence of the global language service industry in the tertiary sector.In essence,industrial convergence results from the interaction of interests and demands of different language service industries,as well as a self-organizing process of dynamic evolution.This paper firstly combs the development of integration in global multilingual industries,which could be divided into the 5 stages:the embryonic stage(1960-1970),initial development stage(1971-...