Narrative computer generation is understood as the task of constructing computational models of the way in which humans build stories. In order to imitate human cognition in intelligent systems, it is necessary to have a good knowledge of the principles that explain how human language constructs concepts. In this paper, a new tool in the form of the Interactive Narrative Graph Grammar (INGG) in which a natural language is translated into the internal language of the semantically enriched graph system is proposed. The system oriented for computer games is particularly relevant in the context of collaborative design. It enables cooperation between narrative designers, who may not have a technical background, and level or world creators in game development. By providing an intuitive yet structured way to represent story elements, relationships, and logic, this system serves as a bridge between storytelling and computational implementation.