This is a separate setting. Go to your Steam Library > Right-click Fallout 4 > Properties > Language. Set this to English . Then, in-game, go to Settings > Display > Language > English.
Copy Fallout4 - Voices.ba2 from SteamApps\common\Fallout 4\Data to a safe backup folder.
Follow the same process as above, but specifically look for DLCRobot - Voices.ba2 within the Data folder to ensure the robot conversations are in English. Troubleshooting: "No Audio in Dialogue" fallout 4 english voice pack link
to a backup folder, switch Steam back to your native language, and then rename/replace the native voice file with the English one. Steam Community Are you looking to change your game language entirely, or are you trying to mix English audio with text from another language?
Steam will automatically begin downloading the English language files. How to Use English Voices with Other Text Languages This is a separate setting
Ensure that the line sLanguage=en exists under the [General] section.
If you want to keep your native language for text but hear English voices, you can use the "Rename Trick" shared by users on the Steam Community: Then, in-game, go to Settings > Display >
Create a backup of your current Voices.ba2 file before deleting it.