PS4 How to add other language subtitles into a game?

[Herfeus]

Hello everyone! Id like to learn how to actually put a subtitle file from a game into another.
In my specific case, i want to add portuguese -br into Elden Ring CUSA 28863 v1.19 @High-speed007. It was supposed to have, even says in the discription it does, but when i installed, it dosent. So, if anybody knows how to add different language subtitles into Ps4 Elden Ring, id appreciate it

 

[Charles_n_town]

Is your system menu in Portuguese? A lot of games forcibly install the language your system menu is in and nothing else. To add a language would probably require modifying the eboot.