This chapter presents a generalisation of the findings of Chapters 5 and 6 with the purpose of computational modelling of interactional practices of error correction for a Communicative ICALL application. Because proper error recognition is a crucial prerequisite for every correction, issues in the conceptual definition of an error in chat are discussed. Further, a model for automated generation of all types of exposed corrections except integrated corrections is proposed. Embedded and integrated corrections in an ICALL application are then discussed with a restriction to answers to polar questions. Results of the models are discussed in comparison with the state of the art.