Thank you Mylenium.
Here are some informations (I hope they are the right ones, I am not an expert )
MacBookPro Retina 15" with Os X 10.9.3 (Norwegian language)
Adobe CC (Illustrator English, Indesign Norwegian and Photoshop Norwegian).
I have tried to change language with download manager to English (International) but after an automatic reinstallation nothing happened.
I have used CC Cleaner Tool and reinstalled the applications.
Here's a guide I have followed too: Installing Multiple Languages of a Desktop Application | Learn Creative Cloud | Adobe TV
It looks like the applications will run the language which is set on the System (except Illustrator which runs in English anyway?)…
Is there any way to change the applications to language different than system language?
Thanks again.