Why are some checkout translations not working in my German store?

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Topic summary

A merchant successfully translated their entire Shopify store to German using Translate & Adapt, but is experiencing two specific issues at checkout:

Problems identified:

  • Product names display in English at checkout (despite showing correctly in German elsewhere on the site)
  • Custom strings previously edited in the original English language file (such as custom shipping method notifications) are displaying in English instead of German

What’s working:

  • All other checkout fields appear correctly in German
  • Domain and language settings are configured properly
  • The custom strings have been re-translated in the app, but these translations are being ignored

The merchant is seeking solutions to ensure these specific elements display in German at checkout.

Summarized with AI on November 25. AI used: claude-sonnet-4-5-20250929.
1

Hi,

I translated the whole store with Translate & Adapt into German and everything works fine except two things:

  1. Product names in the checkout are still in English (they show in German on the site)
  2. All strings that have been edited via original language file (e.g. custom Shipping method notice text) are being ignored, even though they’re translated in the app.

Domain is correct, language is correct - all other fields in the checkout are in German. Only product names and all strings that were previously edited in English, are now displaying in English.

Any ideas, please?

Many thanks.