Nowadays the design of complex systems requires the cooperation of several teams belonging to different cultures and using different languages. It is necessary to dispose of new design and verification m£thot/s to handle multilanguage approaches. This paper presents a multi language co-simulation tool that allows cosimulation of multilanguage specifications for complex systems. The main idea of our approach is to allow validation of the functional completeness of the system at a behavioral level. Mel starts with a configuration file that describes the interconnection between modules written in different languages. It generates automatically a software co-simulation bus and the interfaces required to connect the different simulators in a distributed way. The proposed tool is used to assist the design (If an adaptive speed control system that was described in three different languages