The React component RevisionList had hard-coded labels for Class, Title, Edited By, etc. : https://github.com/WikiEducationFoundation/WikiEduDashboard/blob/master/app/assets/javascripts/components/revisions/revision_list.cjsx
Instead, it should use the I18n javascript to utilize translated strings, like the StudentList component does: https://github.com/WikiEducationFoundation/WikiEduDashboard/blob/master/app/assets/javascripts/components/students/student_list.cjsx