And the import also happens incorrectly. See: https://translatewiki.net/w/i.php?title=Translations%3AUser%3AAbijeet_Patro%2FTranslateHelpMoved-2023-07-05%2FPage_display_title%2Ffr&diff=11842466&oldid=11698216

Do you mean that the import is incorrect in yet another way, or that it does what you see on the special page upon pressing the Save button? If the latter, I think that part is okay – if it shows that it will break things, I’d expect it to really break things. (Of course, it shouldn’t show that it will break things in the first place.)

In T344827#9116202, @Tacsipacsi wrote:

And the import also happens incorrectly. See: https://translatewiki.net/w/i.php?title=Translations%3AUser%3AAbijeet_Patro%2FTranslateHelpMoved-2023-07-05%2FPage_display_title%2Ffr&diff=11842466&oldid=11698216

Do you mean that the import is incorrect in yet another way, or that it does what you see on the special page upon pressing the Save button? If the latter, I think that part is okay – if it shows that it will break things, I’d expect it to really break things. (Of course, it shouldn’t show that it will break things in the first place.)

This is upon saving the button, so the latter.

Change 1008389 had a related patch set uploaded (by Wangombe; author: Wangombe):

[mediawiki/extensions/Translate@master] Special:PageMigration Align the source and translation headers

https://gerrit.wikimedia.org/r/1008389

Testing the latest patch, if I fix the return unshift bug, I get this for a page where display title is translatable. It doesn't look correct:

Change #1008389 merged by jenkins-bot:

[mediawiki/extensions/Translate@master] Special:PageMigration: Align the source and translation headers

https://gerrit.wikimedia.org/r/1008389