In this thesis we describe and develop a simple natural language interface for AI applications. The interface is based on TALK, a system originating from Fernando C. N. Pereira and Stuart M. Shieber. After a brief presentation of their system we delineate implementations of several indispensable language constructions. A complete example, a puzzle solving program combining the enhanced NL interface with a theorem prover, is included. Finally, we discuss and carry out a "purification" of our system, thus enabling it to run in a parallel logic programming environment not fully compatible with Prolog.