Yes, you can. Up to 4 translations.

This is a great strategy to target a specific audience. You add the translations in the field "Description Other Languages". When you do, make sure that the first text is the 2-letter code of the translated language. Then select these 2 letters and choose the option "language" from the formatting styles dropdown menu. Hit enter and write your translation in the text field. Example:

Once you save it, it will automatically show up as a clickable language tab above the Course description.
Note that all Courses load in English first.

A Strategy:
To share a link in your social circles or via an influencer for a particular market you are targeting, you can create a language link for that particular Course. Simply copy the link of the Course and add: ?lang=FR at the end so that it looks something like this:

https://5starteachers.net/my-course-link-here?lang=FR 

The Course translation in French will now appear as the primary language upon loading the page and if your users use Safari's Reader, they will see the Reader in French. Cool, huh?