Find the current product version by going to Help > About Adobe Acrobat Reader DC.
Adobe Document Cloud font pack and spelling dictionary pack enable you to display and interact with documents authored in languages other than those supported in your native Acrobat Reader DC. It is needed to correctly display a document when an author does not embed the appropriate font into the document. It is also needed when the author does embed the font, but the document reader wishes to interact with the content somehow, for example, by collaborating, commenting, or filling out forms.
Find the current product version by going to Help > About Adobe Acrobat Reader DC.
The About pop-up window shows the product name, associated version string, and copyright message. For example, for 2021, the version string is 2021.001.20135.
Download and install the packs specific to your version of Acrobat Reader DC: