fdo#39468 Translate German Comments - difimp and htmlimp

Change-Id: I221d07c56822905c500f11f3f738231259743acd
Reviewed-on: https://gerrit.libreoffice.org/11802
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>