[BUGFIX] RTE: Multilingual classesAnchor titleText not possible

Content language is not correctly set by RTE controller.

Releases: master, 6.2
Resolves: #62399
Change-Id: I85eb570dc266bdc71e4768a13d27c6f2937f7251
Reviewed-on: http://review.typo3.org/33488
Reviewed-by: Jan Kiesewetter <jan@t3easy.de>
Tested-by: Jan Kiesewetter <jan@t3easy.de>
Reviewed-by: Stanislas Rolland <typo3@sjbr.ca>
Tested-by: Stanislas Rolland <typo3@sjbr.ca>