Look, if you want to implement 2 or more languages for your site you need an additional plugin that allows you to translate not just theme/plugin hardcoded text like add to cart, return to previous page etc but allows you to translate site content like products, posts, pages and switch between them, manage sales no matter what language use your clients. We mentioned the list of available plugins to implement this or try googling other plugins if you want.
In case you just need to translate your site to 1 other than English language then Loco Translate plugin will be enough.
