« Intercomprehension is when people try to communicate with each other using their own different languages. Intercomprehension can be explained as a dialogue between people from two different languages. Each one expresses in their own language, making efforts to understand each other.» (wikipedia : https://en.wikipedia.org/wiki/Intercomprehension)

Cf. as well the MIRIADI project for online intercomprehension : http://www.miriadi.net/qu-est-ce-que-miriadi