We do have a number of courses in French, Mandarin, and Spanish, but at this time the majority of edX courses are in English. When you click on a course that you find on edx.org, the information sidebar includes a Languages field that indicates the language the course is taught in. For more information, see Are courses offered only in English?
We are hoping to include other languages in our courses in the near future. For translation assistance, we recommend a tool such as Google Translate.