This set of data includes three subsets of questions asked to a group of Erasmus students before, during, and after their study abroad period. These questions are of different types (closed and open) and were administered through an app developed within the framework of the Glocalsa Project. They are questions related to students’ attitudes, linguistic skills, and glocal competences throughout a study abroad experience. The questions administered during the stay followed the Experience Sampling Method (ESM) and, therefore, were repeated on consecutive days and in 3 periods during the stay. All the questions have an associated code that identifies them and are written in 3 languages: English, Spanish, and Catalan.