Adobe Acrobat Reader can't Edit File thai font.

Adobe Acrobat Reader can't edit file thai font from installed "Extended Asian Language font pack for Adobe Acrobat Reader DC (21.001.20135)" but I Download 64-bit Font Pack and Spelling Dictionary for Reader Version "22.001.20085" which can edit thai font. I want to know because of what, and this two font pack can install on machine together right?