Language Packs (lp.cab) and Windows Deployment

Download language packs -

  1. On the running operating system, open an elevated command-line prompt.
    Type the following command to add a language pack to the operating system.
  2. Copy the command below and run it

dism /online /Add-Package /PackagePath:C:\test\LangPacks\lp.cab


Source: Add and Remove Language Packs on a Running Windows Installation

Multilingual Windows Image Creation

Search for mu_windows_server_2012_r2_language_pack_x64_dvd_2710896.iso