I Can't read Asian language (Korean) PDF with Adobe Acrobat Standard

Dear all,

I need to read, sign & modify Asian PDF with Adobe Acrobat Standard, after a few researches, I found an extended language pack for Adobe Acrobat Reader, it's working well for the reader.

Then I found this post : Solved: Download Asian and Extended Language Pack for Adob... - Adobe Community - 8628890

Unfortunately it didn't work, I tried to add the Korean language to my Adobe Acrobat Standard from the control panel, but it only installed the display language, I can open my application in Korean, but I can't read the PDF in Korean...
I installed all the Korean features I found in the control panel.

I also have two messages when I open a Korean PDF, please see the attachments. One about a missing CMap which it can't be installed due to insufficient privileges (my computer has local admin rights), and the other one is about the Korean language support package, if I click on "OK" nothing happened and the PDF is still unreadable.

My version of Adobe Acrobat Standard (x64) is 24.003.20112.

I am truly grateful in advance for your assistance.
Best regards,
Simon