Hello Nazim,
Thank you for posting question on Microsoft Windows Forum!
Based on your query of not being able to install Chinese Basic typing feature in Win11 Pro 25H2 with error code 0x80240438.
Well! The error code 0x80240438 when installing the Chinese Basic typing feature in Windows 11 Pro 25H2 probably points to a problem with Windows Update services or the Microsoft Store integration, because language packs are delivered through those channels.
The suggestion here is to try Installing via PowerShell or DISM by right-clicking the Start button and select Terminal (Admin) or PowerShell (Admin) and run these commands For DISM Dism /Online /Add-Capability /CapabilityName:Language.Basic~~~zh-CN~0.0.1.0 or for PowerShell Add-WindowsCapability -Online -Name Language.Basic~~~zh-CN~0.0.1.0 This will bypass the Settings UI and directly installs the language capability.
In case, machine is pointed to WSUS and WSUS does not host the Feature-on-Demand payloads. If so you must allow the client to pull optional features directly from Windows Update by opening gpedit.msc and navigate to this path: Computer Configuration → Administrative Templates → System → Specify settings for optional component installation and component repair. Set it Enabled, and check “Download repair content and optional features directly from Windows Update instead of Windows Server Update Services (WSUS)”. Then run gpupdate /force and retry.
If online installation keeps failing, you can consider to manually add the language pack by mounting a Windows 11 ISO matching your build and install it with DISM. This article https://gist.github.com/samleong123/01fb0ccadb3706140f7fe985dc88900d is for your further reference.
Hope the above information is helpful! If it helps you getting more insight into the issue, It is appreciated to consider clicking "Accept Answer". Should you have more questions, feel free to leave a message.