Description

In a multi-language setup with workflow enabled and draft status, the iFrame preview URL is correctly calculated for all links in "Revisions" tab, which follow the URL structure: /[langcode]/node/[nid]/revisions/[vid]/view.

But the iFrame URL is wrong for drafts not in the node original language when visiting the "Latest revision" tab. URL in this case has the structure: /[langcode]/node/[nid]/latest.

In this case, the latest revision of the entity in its original language is displayed.

The following screenshot demonstrates the URL language in the browser is "de-ch" but the URL in the iFrame is "de":

In my screenshot in the preview frame an error appears, but that might be related to my setup. The important part is wrong langcode in the URL.

Steps to reproduce

In a basic Next.js 1.6.3 setup on Drupal 10

• Enable language and workflow. Set multiple languages with URL detection method and workflow with Draft and Published statuses, and transitions between both of them.
• Create a node in "Language 1".
• Translate to "Language 2" and publish.
• Edit again in "Language 2" and save as draft.
• Click "Revisions" on translation and preview the first in the list -> Correct content will appear.
• Click "Latest revision" -> The content in "Language 1" will appear.
• Inspect frame URL -> The slug URL parameter contains language 1 langcode, not language 2.