I’d like to slightly change some text of the german woocommerce version. For example to add a few words at the [woocommerce_thankyou] site. I’m using Propulsion and woocommerce German Market and the german adoption from you. Where can this be done?
I think you need to edit the german language files (po/mo files) which can be found in wp-content/plugins/woocommercelanguagesformal or wp-content/plugins/woocommercelanguagesinformal folder. You can use tools like poedit to edit the po file. Then upload both files (po/mo) and overwrite the existing files.