If you are playing the DRM-free version without the Galaxy client, you need to download the specific language installer manually.
This is the "better" and most reliable way to ensure all voice-over and text files are correctly updated. Open GOG GALAXY and go to your "Owned games" The Witcher 3: Wild Hunt Customization button (next to the Play button). Navigate to Manage installation dropdown menu, select Portuguese (Brazilian) If you are playing the DRM-free version without
Se você prefere o instalador manual sem usar o cliente GALAXY: Acesse sua conta no site oficial da GOG . Clique em The Witcher 3: Wild Hunt na sua biblioteca. If you are playing the DRM-free version without