A: Yes. You can install French, German, and Japanese on the same machine. You switch between interfaces via Preferences > Language.
While Adobe Acrobat Reader DC is the world’s most trusted free PDF viewer, its default interface and text-handling capabilities are often limited to a single language. This is where the becomes essential. adobe acrobat reader dc language pack
Most users assume that if they open a foreign-language PDF, Reader will automatically display the text. This is partially true. If the PDF contains embedded fonts, you will see the characters. However, you will not be able to interact with that text effectively. You cannot search for a French word, copy Arabic text to paste into a translator, or use the "Read Out Loud" feature on a Chinese document. A: Yes