The console picks up the language from the regional settings, s if you want the console to be in English, set the regional settings to English.
(Please note that ePO 3.6.1 is no longer supported.)
You'll probably need to restart the services as well for the change to the be picked up by McAfee. I know that this is the case time settings in EPO4.0
In this case you'll only need to close and reopen the console - the console language setting is independent of the server.