[TASK] Add acceptance test for language module

Resolves: #78405
Releases: master
Change-Id: Ia821ec39f98a0fadefd7b44a59b2467f478ff9bc
Reviewed-on: https://review.typo3.org/50345


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Joerg Boesche <typo3@joergboesche.de>
Reviewed-by: Gordon Brüggemann <gordon.brueggemann@di-unternehmer.com>
Tested-by: Gordon Brüggemann <gordon.brueggemann@di-unternehmer.com>
Reviewed-by: Jan Helke <typo3@helke.de>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>