This paper describes an implementation of Collaborative Translation Environment ‘Yakushite Net’. In ‘Yakushite Net’, Internet users collaborate in enhancing the dictionaries of their specialty fields, and the system thus improves and expands its accuracy and areas of translations. In the course of realization of this system, we encountered several technical challenges. We would like to first explain those challenges, and then the solutions to them. Our future plan will also be explained at the end.

This paper describes a new version of our machine translation system PENSÉE. In the light of its past systems, new PENSÉE is designed to improve portability from developers' point of view and translation quality from users' point of view. The features of new PENSÉE are: 1) Java implementation and 2) pattern-based transfer approach. In addition, new PENSÉE places a great importance on user interface especially in building user dictionaries. We will discuss why and how we resolve the existing MT problems and present dictionary building tools to support user customization.