It is undeniable that English has become the worldwide lingua franca for the academic world. Many countries have therefore opted for Higher Education programmes fully in English, of which the Netherlands is the frontrunner. Language policies that include drawing on students plurilingual repertoires could offer the opportunity to employ several languages in the classroom (Duarte and van der Ploeg 2019). Although the attitudes of lecturers have been studied before, students are often overlooked when creating language policies and in particular students in language-related courses. This mixed-method study aimed to map the affordances and constraints associated with the implementation of a plurilingual policy from the students' perspective. First, 20 h of classroom observations showed that plurilingual approaches were used when explaining concepts, yet were refrained from when struggling with the language of instruction. Second, a survey with 103 students attending language-related courses showed general positive attitudes towards using plurilingual approaches, in which being proficient in a large number of languages played a significant role. Overall, the affordances of a plurilingual policy, such as new ways of thinking, and the use of a student's full linguistic repertoire, surpassed the constraints, such as the lack of inclusion, and as a result, the advantage for Dutch students was mentioned.