From the Fascism site: MA and PhD students a 50% discount. Not many journals have language specific to students at this point in time, although student discounts may often be subsumed in the category of discounts for authors who cannot afford to pay.
This post is part of the open access article processing charges project.
Morrison, H. (2015). Student discounts. Sustaining the Knowledge Commons / Soutenir Les Savoirs Communs. Retrieved from https://sustainingknowledgecommons.org/2015/05/22/student-discounts/