It's fast, it's easy, and it does the trick. (Is that tricky?) If you're unsure, backup these three folders beforehand. It just means that you have to rename three folders. No, it does explicitely not mean that have to open up the application itself. Support files required resourcesNow when I open illustrator everything is in English! Move undesired language pack file folders (mine was named daDK for Danish) from the folders below to a backup location on your computer. Change language in CC and reinstall illustrator as described in the video posted earlier. Okay, so I know this is almost 3 years old, but I struggled a lot with this and finally found a solution for windows:I'm on a windows 8.1 with adobe cc 2014.

I changed my Mac language (just in case) to English too.4) Download and install Illustrator.5) Change Mac language back to original language.Thanks again for all support in this forum. ManishThanks a lot.Your answer complemented wonderfuly what Ton said and I've done exactly what you said and now I have a Mac in Portuguese and Illustrator in English as I wanted.So, to sumarize the answer:1) Uninstall previous and current version of Illustrator.2) Run CleanerTool to be sure that there isn't any file left behind.3) Change Adobe Application Manager to the language you want to install Illustrator (in my case, North American English).

Cambiare lingua adobe illustrator