Abstract
Through reporting on an initiative in South Africa that aimed to provide epistemological
access to teachers and learners of mathematics (and science) through translating
mathematical concepts into two indigenous languages, this paper argues for the urgent
development of mathematical registers in indigenous languages for mathematics and
science. The pilot research reported on in this paper indicates that the use of a multilingual
concept literacy book impacted noticeably on the code-switching practices of selected
teachers who switched between English and Xhosa in their teaching of mathematics.