TYPO3 Core

The documentation states that default behaviour should be the request language: https://docs.typo3.org/c/typo3/cms-form/main/en-us/I/Config/proto/finishersDefinition/finishers/EmailToReceiver.html#options-translation-language

A security patch changed the default value to the "default language": https://review.typo3.org/c/Packages/TYPO3.CMS/+/68436

I think this might be the issue, why finisher translations started to have the default translation language (english) in every language.

Removing the entry:

      translation:
        language: Default

restores the automatic behaviour. This is only possible through manual editing of the YAML though. I believe the select field needs another entry for "Auto".

Patch set 2 for branch main of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/81583

Patch set 3 for branch main of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/81583

Patch set 4 for branch main of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/81583

Patch set 5 for branch main of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/81583

Patch set 6 for branch main of project Packages/TYPO3.CMS has been pushed to the review server.
It is available at https://review.typo3.org/c/Packages/TYPO3.CMS/+/81583