Hi @bolindertasche ,
Nick here from Shopify. Really good question!
It’s definitely possible to convert/translate your store from English to German and it is via an app from the Shopify App Store. There are a few different apps I like for this, but I would lean to Langify being my favourite one. You can see a link to it and some of the other translation apps below:
Do you feel like one of these could do what you’re looking for? Let me know!
Thanks, Nick