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

If you already have English voices but want a "review" of better options, the modding community offers higher-fidelity alternatives: High-Fidelity Voices Project

Similar language options are available in the launcher or the game management settings, allowing you to download the official English audio pack legally.

Use 7-Zip or WinRAR to extract the downloaded archive. You are looking for two critical files:

Do put the .ba2 files directly into the Data folder. They must go into the specific Voice subfolder.