1-Window PowerShell=>Run As administrator
Windows PowerShell
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2-user command: Get-WinUserLanguageList
LanguageTag : en-US
Autonym : English (United States)
EnglishName : English
LocalizedName : English (United States)
ScriptName : Latin
InputMethodTips : {0409:00020409}
Spellchecking : True
Handwriting : False
LanguageTag : zh-Hans-CN
Autonym : 中文(中华人民共和国)
EnglishName : Chinese
LocalizedName : Chinese (Simplified, China)
ScriptName : Chinese (Simplified)
InputMethodTips : {0804:{81D4E9C9-1D3B-41BC-9E6C-4B40BF79E35E}{FA550B04-5AD7-411F-A5AC-CA038EC515D7}}
Spellchecking : True
Handwriting : True
3-user command> Set-WinUserLanguageList en-us,zh-Hans-CN
Confirm
Continue with this operation?
[Y] Yes [N] No [S] Suspend [?] Help (default is "Y"): y
PS C:\WINDOWS\system32>
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4-install KhmerUnicode2.0.1.exe