Message archives
Message archives (named with the format Msg_XXxx.product.ssarc, where XX is the region code and xx the language code) are Yaz0-compressed SARC archives which contain the game's text files. Multiple different archives exist, one for each language. All of the contents are msbt files.
Msg_XXxx.product.ssarc
ActorType
Contains the names, and other related text, of various actors, including inventory items, NPCs and enemies.
DemoMsg
Contains text used in cutscenes.
EventFlowMsg
Contains text used in event flows, such as NPC dialogue. Text for Demos (cutscenes) is however located in DemoMsg rather than EventFlowMsg.
LayoutMsg
Contains standard text used in the game's UI, HUD, and menus.
QuestMsg
Contains quest-related text, including quest logs and NPC dialogue.
ShoutMsg
Contains subtitles for voice-acted dialogue spoken by allied NPCs during gameplay.
Tips
Contains hint messages displayed on loading screens.
StaticMsg
Contains various miscellaneous text, in particular all location names and dungeon names.