Replacing Japanese language pack files

I have noticed that when we install Windows 10 1909, the japanese language pack stops working. The only fix I found so far is to replacing the file from 1803 version of language pack to 1909.

So i’m copying these files IMJPPSGF.FIL, imjptk.dic, IMJPZP.DIC, mshwjpnrIME.dll and SDDS0411.DIC to this directory

c:\windows\IME\IMEJP\DICTS

Even the system account can’t replace these files, not sure why. most likely the files are being used at the time of script running.

This is what I ran as script

delete "C:\Windows\IME\IMEJP\DICTS\IMJPPSGF.FIL"
copy " __Download\IMJPPSGF.FIL" "C:\Windows\IME\IMEJP\DICTS\IMJPPSGF.FIL"
delete "C:\Windows\IME\IMEJP\DICTS\imjptk.dic"
copy " __Download\imjptk.dic" "C:\Windows\IME\IMEJP\DICTS\imjptk.dic"
delete "C:\Windows\IME\IMEJP\DICTS\IMJPZP.DIC"
copy " __Download\IMJPZP.DIC" "C:\Windows\IME\IMEJP\DICTS\IMJPZP.DIC"
delete "C:\Windows\IME\IMEJP\DICTS\mshwjpnrIME.dll"
copy " __Download\mshwjpnrIME.dll" "C:\Windows\IME\IMEJP\DICTS\mshwjpnrIME.dll"
delete "C:\Windows\IME\IMEJP\DICTS\SDDS0411.DIC"
copy " __Download\SDDS0411.DIC" "C:\Windows\IME\IMEJP\DICTS\SDDS0411.DIC"

It’s not deleting any files and not replacing with new. Need suggestions.

@jgstew @JasonWalker please help