Russian
We recommend the Microsoft Office 2013 Language Pack to:
You are trying to install, for example, a German UI pack on an English-only “Home & Student” edition. You need Professional Plus or Volume License editions for full UI switching. Alternatively, install the Proofing Tools Kit instead for spellcheck only.
Note for x64 (64-bit) users: Replace _x86 with _x64 in the link for most languages, or look for the specific 64-bit files on the Microsoft Update Catalog.
The Vanishing Trail of Office 2013 Language Packs — And Why “Direct Links” Aren’t the Real Answer