Why won't PDFs won't open. Directed to installed Asian Fontpack

[#1]

Intermittantly, Adobe PDF reader requests that I install a fontpack to read PDFs on my hard drive. I am directed to this page to install an Asian Fontpack Adobe - Adobe Reader : For Windows : Adobe Acrobat Reader DC Font Pack (Continuous) - For Acrobat Re...  . I have the choice of several Asian languages. The PDFs are in French so I'm confused why this is happening.
Thanks for your assistance

PC Windows 10.

[#2]

Install the Asian font pack. There are no other packs. Some software makes PDF files with hidden Japanese characters, but nobody knows why.

[#3 · Accepted solution]

Hi leena,

Sorry for the delay in response. 

Adobe Acrobat Reader DC Font Pack enables you to display and interact with documents authored in languages other than those supported in your native Adobe Reader. It is needed to correctly display a document when an author does not embed the appropriate font into the document.

Try downloading the font pack on the machine using the link you mentioned and check if you are still facing issue while opening pdf files in Reader.

Let us know how it goes.

Shivam

[#4]

Why be forced to download a fontpack one will never use? It just takes up valuable space.

[#5]

Because for some reason you have a PDF that uses Chinese, Japanese or Korean fonts, which you may not even see on screen. There was a bug in a particular scanner which made it do this for all the PDFs it scanned. There may be other cause. Anyway, so far as Acrobat or Reader knows, you DO need this pack, so do get it, or don't read the files.