If you are playing the official version rather than the RUNE release, the process is managed differently:
The RUNE language pack adds full audio and text for the following languages: horizon zero dawn remastered language packrune link
Arabic, French, German, Italian, Polish, Portuguese (Brazil & Portugal), Russian, and Spanish (Spain & Latin America). If you are playing the official version rather
Open the directory where your game is installed. Most language assets are stored in the \Horizon Zero Dawn Remastered\Packed_DX12\ folder. Portuguese (Brazil & Portugal)