If you need help resolving a specific error during this setup, tell me: What are you using to run the game? What error message or behavior occurs when you launch it?
The skuconfig.dat file (in data_win64 ) controls which languages appear in the in-game menu. Open it with any text editor (like Notepad). You'll see XML-like code:
Follow these verified methods to download or activate the English language files in Watch Dogs. Method 1: Verify Game Files (Official Platforms)
Start Watch Dogs and go to the main menu. Navigate to . You should now see English available as an option for both Spoken Language (audio) and Written Language (interface/subtitles). Select it and confirm.