Abstract: Multilingual computer-specified control messages are communicated to an operator in an operator-selected language by the combination of a message writer and a language changer. The language changer contains a set of message storage tables, each containing a set of control messages written in a particular language, and a set of message address tables, each message address table referencing a computer-generated message code indicative of a specific condition to a respective one of the control messages in an associated message location table. In accordance with an operator command indicative of a desired control message language, the language changer supplies the message writer with the corresponding message storage table and message address table.