Language MOOCs (L-MOOCs) are the MOOCs (Massive Open Online Courses) that focus on language learning. They may often present several problems in their design and development, such as their feasibility to improve students’ linguistic levels or in their materials’ adequacy and variety. Many of these courses have subsequently become Open Educational Resources (OERs), and their activities can be implemented in different learning situations. Our paper discusses the evaluation of the integration of the L-MOOC titled “Learn academic Spanish” (Aprende español académico) into existing curricula and the validation process carried out to evaluate its validity for the purpose of learning languages. The L-MOOC was developed within the MOOC2move project between 2018–2021 and was designed by the Open University, with the collaboration of the Spanish universities of León and Alicante. The evaluation and validation were carried out in October 2020. In an exceptional hybrid teaching situation, due to the COVID-19 pandemic, the L-MOOC was taken by 345 students from the Faculty of Education of the University of Alicante. The validation of the course consisted of taking the L-MOOC, participating in the forums on the MOOC and completing the questionnaires to improve the materials. In our study, a quantitative analysis was carried out through two questionnaires provided to the students before and after implementing this L-MOOC. The results obtained underlined the effectiveness of this L-MOOC. This course and the materials provided allowed the use of OERs to practice academic Spanish and improve communicative competence of its users.