Find the language string.
If you purchased or activated your game through Steam, this is the safest and easiest method. Open your Steam client and go to your Library . just cause 2 change language russian to english
(critical for text): Open Documents\Square Enix\Just Cause 2\Saves\JC2Settings.bin – but this is binary. Instead, use the launcher : Find the language string
If Method 1 doesn't work, you can force the language change through the Windows Registry. just cause 2 change language russian to english
If Steam fails to change the language, it might be due to a region-locked version. Contact Steam Support to see if the key can be changed.