If your products are sold via an online store, you can get your checkout translated to whichever language you prefer by editing your theme. You can also translate checkout fields individually if you want to.
If your theme comes with translations for over one language, then you can go to the theme editor and select another language to translate your checkout into.
This article on how to select a new checkout language would show you the steps to do that.
Hope everything works well for you :)