Just remember to use the GOG offline installers for the safest, most permanent backup of your language files. Now, go forth and hunt monsters in the language that feels like home. Boa sorte!

on GOG, you don't actually need a separate "better" download link. Since you own the game on GOG, the official language packs are already available to you for free through the client or your account library. Here are the three best ways to set it up: 1. The Fastest Way: GOG GALAXY

In the "Offline installers" section, scroll down to the section. Download the Portuguese (Brasil) pack.

select the game in Lutris, then you'll have a little wine icon at the bottom, click on it and select 'Run EXE inside Wine Prefix'. Lutris Forums Installing language packs for The Witcher III: Wild Hunt