Elias here with Shopify Support. Thanks for reaching out.
Just to confirm, are you looking for a translation app that will automatically translate the language? Or, an app that can detect which language to display for your customers?
There are a couple of third-party translation apps with automatic language detection, such as langify and Translate Your Store - Weglot, which can auto-detect the language your customer's uses and show your store in their language. However, the languages you choose to offer does need to be translated beforehand. Though the apps may be able to translate some languages for you automatically, I'd still recommend reviewing them and making sure they are grammatically correct as well. That being said, Google Translate is awesome and extremely helpful with translations.
If you need any help with these apps, you can always reach out to the app developer through the contact information found in the Support section of their app's page.
Let me know if this is what you're looking for?
If you have any questions, just let me know.