All the texts in the game are gathered in the texts.pak file (with variations: p5-texts.pak, a1p1-texts.pak, ...), located in the data/ folder (or similar - see below) inside the game's installation folder. Each patch brings its own updated texts.pak, that contains all the needed texts cumulatively.
The localized texts are gathered here to allow modders easier access to them for their work, and to help spread unofficial text patches for all the players, while allowing them to revert back to official texts at any time. Use our "Localized Texts" thread if you have any question. 2b1af7f3a8