I was going to change the language from French to English. Therefore I uninstalled and installed again for the indesign as English version.
After it was installed , it was nothing change to the language .
Hope anyone can help me , thanks
By the way, the version of indesign I used is Cs4.
What is the language of you OS?
Does you installer support the different language? Does so the serial number? (In CS4 not every serial was valid for everyl language.)