change language in properties panel (illustrator cc 2021)

Hi there, I too faced this issue but now I have fixed it, follow these steps:

Go to:

C:\Program Files\Adobe\Adobe Illustrator 2021\Support Files\Required\UXP\extensions\com.adobe.illustrator.propertiespanel

Back up the "main.js" file at the above location and rename the "main.js.bak" to "main.js", and you are good to go it.

Good luck 🙂

(PS You can go to this location with Run or Windows+R)