Navigate to HKEY_LOCAL_MACHINE\Software\Wow6432Node\Ubisoft\Far Cry 3\ .
If your game has the English text but not the audio, you can check the data_win32 folder in your game directory. Look for files named sound_english.fat and sound_english.dat . If they are missing, you may need to on Steam or Ubisoft Connect to re-download the correct audio assets. English Language Pack For Far Cry 3
DLC uses separate archive files ( fc3_dlc1.dat , etc.). Solution: Find the English DLC voice pack. This is rarer. Alternatively, disable DLC in game properties. disable DLC in game properties.