If you are dealing with a cracked/repacked version (often where terms like "Rune" or manual "run install" appear), the issue is almost always that the repacker removed the language files to save space. You must download the language pack separately, extract it using WinRAR, and place the files directly into the game’s Paks or Movies folder, overwriting existing files.
If you legally own the game but hate re-downloading 150GB to switch from English to Japanese audio, you can extract the language files from Steam using the console: horizon zero dawn remastered language packrune install
Is the missing, or are you just trying to change the text ? Guide :: How 2 reduce game size of Horizon Zero Dawn If you are dealing with a cracked/repacked version
: Language packs can be large (some reports suggest over 14 GB for a full set of files), so it is often better to delete the ones you aren't using to free up space. for any of these languages? Horizon Zero Dawn™ Remastered General Discussions 1 Nov 2024 — Guide :: How 2 reduce game size of
: Ensure the language .bin files exist in the Packed_DX12 folder. If they are missing, you may need to re-run the installer and check the language boxes you want. If you'd like, let me know: Are you on Steam, Epic , or using a manual installer ? Which specific language are you trying to add?