If your server is offline or the automated download fails, you must use the lpksetup tool with a pre-downloaded .cab file.
This is the simplest way to add the Japanese language if your server has an active internet connection.
For Windows Server 2012 R2, the Japanese language pack can be acquired either through the automated interface or by manually downloading and installing the offline .cab file . Because this OS version has reached its end of life (EOL), online downloads through Windows Update may sometimes fail, making manual installation the more reliable method. Method 1: Installing via Control Panel (Standard) windows server 2012 r2 japanese language pack download
Follow the prompts to complete the installation and restart your system. Important Considerations
: Japanese will now appear in your list. Click Options next to it, then click Download and install language pack . If your server is offline or the automated
: Click Start , select Control Panel , and navigate to Clock, Language, and Region > Add a language .
to the location where you saved the Japanese lp.cab file. Because this OS version has reached its end
: Sign out or restart the server to apply the changes to the entire UI. Method 2: Offline Download & Manual Installation