: Ensure the checkbox for Install language pack is selected. If you want Windows to display everything in Arabic, also check Set as my Windows display language .

: To apply the display language changes, you must sign out and sign back in. Offline and Manual Download Methods

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:

: Navigate to the Time & Language section.

For users needing an or manual .cab file (common for IT deployment or systems without internet): Language packs for Windows - Microsoft Support

: On the left sidebar, click Language , then select Add a language under the "Preferred languages" section.

: Click the Start button and select the gear icon for Settings .