[BUGFIX] Make sure correct sys_language_uid is set for irre items

Resolves: #76440
Releases: master, 8.7, 7,6
Change-Id: I519641eadd3342369b66252da2d50ca54726aacb
Reviewed-on: https://review.typo3.org/53418


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Nicole Cordes <typo3@cordes.co>
Tested-by: Nicole Cordes <typo3@cordes.co>
Reviewed-by: Markus Klein <markus.klein@typo3.org>
Tested-by: Markus Klein <markus.klein@typo3.org>