Microsoft no longer provides standalone executable installers for language packs to home and Pro users. Instead, they are delivered as "Local Experience Packs" directly through the OS:
For users needing an or manual .cab file (common for IT deployment or systems without internet): Language packs for Windows - Microsoft Support
: Navigate to the Time & Language section.
: To apply the display language changes, you must sign out and sign back in. Offline and Manual Download Methods
: On the left sidebar, click Language , then select Add a language under the "Preferred languages" section.