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bonjour j'ai acheter sim city 3000 car ca me rapelle ma jeunesse mais je ne trouve pas comment le mettre en francais quelqu'un sait il comment faire merci?
Not sure if you will get an answer in French, so I will do my best to keep it simple:

Go to the game's folder, usually '\GOG\SimCity 3000 Unlimited\'

Run 'language_setup.exe'

Select 'French'

Press 'Save and exit'