Problem/Motivation
Related to #2946333: Allow synced Layout override Translations: translating labels and inline blocks
But this would be for defaults.
Proposed resolution
Remaining tasks
Basic implementation
Define where to set what's the default language of the layout? (like in views)
Check why URL is not accessible (403) in some cases (#64)
Hide "Translate layout" link if translation is disabled
Implement tests
Review
Commit
User interface changes
API changes
Data model changes
Release notes snippet
IMPORTANT:
The MR requires MR!1505 from #2946333: Allow synced Layout override Translations: translating labels and inline blocks! (https://git.drupalcode.org/project/drupal/-/merge_requests/1505#note_59580)
You have to use both combined to make it work!