When the app is in one language but alt text is generated in another.
It is normal for UI and AI languages to differ — they are independent settings. A mismatch is only a problem when AI output is not the language you wanted on products.
Fix AI output
- Settings → AI output language → choose the correct locale
- Run a test task with overwrite on a few products if old alt text must be replaced
- Confirm format components (title/tags) are in the expected language in Shopify