If you own the game on GOG (Good Old Games) or Steam, you already have legal access to the language files without needing to download a separate "pack" from a third-party site.
To get the language pack running on your PC, follow these steps: GOG Galaxy : Navigate to The Witcher 3 in your library. Click the icon next to the "Play" button, select Manage installation . Under the If you own the game on GOG (Good
: Under the "Extras" or "Backup Offline Installers" section, you will see a specific download link for the Portuguese (Brazilian) language pack . If you own the game on GOG (Good