The languages we currently support are English, Spanish, German, French, Turkish, Polish, Persian, Russian and Arabic.
In order to add one or several of these languages to your shop, click on Settings > Online Shop Settings, and select the language(s) you wish to add.
Note that your products, product packages and page names will need manual translation after you have enabled a new language. You can do this translation by going to each of their settings and then adding the translations in the tabs above.