The online help in LibreOffice contains a link for downloading additional language packs but the link has not been updated for LibreOffice and still points to the page relevant to OpenOffice, http://wiki.services.openoffice.org/wiki/Download_OpenOffice.org_LanguagePacks.
[Reproducible] with "LibreOffice 3.3.2 – WIN7 Home Premium (64bit) German UI [OOO330m19 (Build:202 / tag 188.8.131.52)]". You will find the link under heading "Adding more UI Languages" in localized Help package [EN] and in WIKIHELP under a.m. URL
This one blocks
Bug 33150 - [Task]: Remove OOo references from Help
Fixed on both libreoffice-3-4 and master.