1. A method for establishing with a computer system an audio conference between two or more communication devices each associated with one of a plurality of different languages, wherein one of said different languages represents a main language, said method comprising the steps of: providing a computer system connecting each of one or more of said communication devices associated with a different one of said languages than said main language with a communication device of an interpreter for interpreting between said different one of said languages and said main language to enable the communication device of the interpreter to receive voice communication from each of the one or more of said communication devices associated with said different one of said languages, and connecting the communication device of the interpreter associated with each one of said different languages than said main language with one or more of said communication devices in the main language to enable the communication device of the interpreter to receive voice communication from said one or more communication devices associated with the main language; and controlling the communication device of the interpreter associated with each one of said different languages than the main language during oral translation by the interpreter between said one of said different languages and said main language as to which one of (i) one or more of said communication devices associated with the main language is connected to the communication device of the interpreter, or (ii) one or more of said communication devices associated with said one of said different languages is connected to the communication device of the interpreter, to receive voice communication of the interpreter in one of said main language or said one of said different languages, respectively, in which said controlling step is carried out by said computer system responsive to the interpreter at the communication device of the interpreter for at least one of the one or more different languages than the main language over a single voice communication line between the communication device of the interpreter and said computer system.