Smart Emails currently translates and installs the notification email body. Shopify stores the subject line as a separate translatable field, and Smart Emails does not currently register subject-line translations.
What is translated automatically
Google Cloud Translation translates supported visible text collected from the Smart Emails primary editor. Smart Emails then generates and registers the localized Shopify body_html for every installed primary template.
What is not translated automatically
The Shopify notification subject line is not part of the generated Smart Emails HTML and is not currently included in the automatic installation process.
If a localized subject is required, maintain it separately through Shopify's supported translation tools or notification-language controls. Test the real notification for each important language.
Why the preview is not enough
A Smart Emails test checks the generated body and design. A real Shopify notification is required to verify the final subject, event data, and customer-language selection together.
| This article describes the current implementation. It will be updated if automatic subject-line registration becomes available in Smart Emails.