fdo#39468 Translate German comments - sw/source/core/

Change-Id: I64743b4f6b7bfd44b410d63ab13298a000a47221
Reviewed-on: https://gerrit.libreoffice.org/11821
Reviewed-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>
Tested-by: Samuel Mehrbrodt <s.mehrbrodt@gmail.com>