Best answer by Maryam
Here on Coursera, the members of the Global Translator Community translate English subtitles into other languages. Not all courses have non-English subtitles. To find out whether a course offers Arabic subtitles, for example, one needs to check out its home page.
If you're interested in learning more about this community and/or if you'd like to become a volunteer translator, please take a look at this thread:
Join the Coursera Global Translator Community
If this does not answer your question, do let me know.