Hi @Leo103222
1) Ensure the Windows Update service is running
a) Go to Start Menu > Run > services.msc
b) Find Windows Update and try starting the service:
2) Run sfc /scannow
a) Go to Start Menu > Right click cmd > Run as Administrator
b) Type sfc /scannow > Press Enter
After this retry downloading the language pack.
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If this is helpful please accept answer.