[BUGFIX] Re-add language flag for each CE in Page Module

Due to some setups within e.g. shortcut elements did not have
a proper information anymore when used in language mode and mixed
setups.

Resolves: #95324
Related: #95302
Releases: master
Change-Id: Ic2022ab113c2ec0f75fb05d5c1a34be39387ec87
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/71212


Tested-by: core-ci <typo3@b13.com>
Tested-by: Jonas Eberle <flightvision@googlemail.com>
Tested-by: Rachel Foucard <rfoucard@w-seils.com>
Tested-by: Oliver Bartsch <bo@cedev.de>
Reviewed-by: Jonas Eberle <flightvision@googlemail.com>
Reviewed-by: Rachel Foucard <rfoucard@w-seils.com>
Reviewed-by: Oliver Bartsch <bo@cedev.de>