To download the English voice pack for Fallout 4, follow these steps:
: Navigate to Documents\My Games\FalloutMS , open Fallout4.ini , and manually change the line sLanguage=xxx to sLanguage=en . Customizing Audio/Subtitle Languages fallout 4 english voice pack link
If you want to keep your text in another language but use English audio, you can manually swap the voice files: To download the English voice pack for Fallout
Are you trying to change the to English, or just the character voices while keeping your current text? Play the game with the English voice and what ever Subtitle fallout 4 english voice pack link