Given the task definition and input, reply with output. In this task, you are given a paper review. Based on the review, your job is to identify language and generate "en" if the review is in English or generate "es" if the review is in Spanish. Note that URLs in the text have been replaced with [Link].

This paper presents a software tool that is useful in the context of software engineering. The authors do a good job describing the technical details of the tool. However, there is little information about the novel aspects of the proposed tool, How the proposal compares to other existing tools (if any)?
en