I have Craft on local (Pro edition) that was installed with French as the system language. Is there a way to change to another language (English for example) for the control panel? I want to change the system language, not the content of my entries (localisation).
If you go to Settings->Locales in the control panel, you can add "English - en" as a new locale/language to Craft.
From there, you can can what language the Control Panel will display on a per user basis by going to the user's account and setting the "Preferring Language" setting.
You have to set
'defaultCpLanguage' => 'en', in