The prototype is intended to be operated by both speakers who have different disabilities or mother tongues. While composing an utterance, this system is displayed in a speaker's own language, and when finished, the utterance and all the other components on the screen are automatically translated and spoken in the other language. The interface of the prototype was designed to be easy to recognize and efficient in use. Eight different cards are provided on the prototype, which was developed initially for the situation of being at an airport check-in counter. Each card has a tag with a symbol which corresponds to its category so that the user can easily recognize which card is currently chosen.
Symbols also accompany words and phrases as a visual prompt.
This also makes the system usable by non-readers. Conversational pragmatics were taken into account for the interface design of the prototype. Pre-stored conversation materials are arranged in accordance with the frequency of use, conceptual grouping and conversation flow. A screen shot of the same state of the interface in the three different language versions is shown below. At the top is a log of the entire conversation.