[BUGFIX] Use language fields as defined in TCA for „Duplicate“

Change-Id: I123e6dae9b0b6a5bb68261bc9ae5aaf75a64822d
Resolves: #83926
Related: #83892
Releases: master
Reviewed-on: https://review.typo3.org/55741


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>