I have downloaded rise of the nations : thrones and patriots which was not in english and it was a real pain to play the game.
Fortunately, I had Rise of The Nations (no expansion) installed which was in english language.
I did the following :
1) Installed both RoN and Ron : T&P
2) Mounted RoN in virtual drive
3) Opened RoN : T&P exe
and.... there you go.....
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here is how to change the current language to English. download this files and follow the instruction.. download the file here.. http://www.4shared.com/rar/_ULOlpQa/Eng_language.html
You can not change the language.
Go to settings, language and from there you can change the language. It may cost in some cases
Unfortunately you cannot change the game's language.
Check out the related link for a video on how to change the language on FIFA 12.