We present a prototype interlingual communication system that is being used to collect a corpus of task based dialogues between speakers of different languages. This corpus will be used to assess human reactions to an automated speech-to-speech translation system. In this demonstration we show how the HCRC Map Task can be adapted to support data collection in this interlingual environment, and how we used easily accessible speech and language technology for the rapid prototyping of the system used for data collection. An explanation of the nature and purpose of the data we are collecting is also presented.