I’m very new to Shopify and I try my best.
When I translated my Swedish web shop into English, I used Translate and Adapt, but I remember writing the text for “Apply for our newsletter” manually. Now I need to edit the text, but can’t remember where I did this. I can’t find my way back.
From what you’ve described, it’s probably on the homepage in a section. Here’s how you’d translate that / find your previous translations: https://community.shopify.com/post/2146073