It's a binary file not a text.

public static byte[] Decryption(byte[] bytes)
{
long num1 = 1024;
long num2 = (long) bytes.Length;
long length = num2 - num1;
byte[] numArray = new byte[length];
long num3 = 0;
for (int index = 0; (long) index < length; ++index)
{
if (num3 < num1)
{
numArray[index] = bytes[num2 - num1 + num3];
++num3;
}
else if ((long) index < num2)
numArray[index] = bytes[index];
}
return numArray;
}

Just looking for "p_fa.mpc" in .assets files.

In the "EmbeddedAsset/FA/p_fa.mpc".
Name: "TBUDGoStd-Bold"
Encrypted.

You can easily change it:
https://steamhost.cn/steamcommunity_com/groups/ff-modding/discussions/13/357284131804133221/

The new version is available: (18.01.2021)
Sources (for developers): https://github.com/Albeoris/Memoria
Release (for players): https://github.com/Albeoris/Memoria/releases
Mirror: https://ff9.ffrtt.ru/rus/Memoria.zip
NexusMods: https://www.nexusmods.com/finalfantasy9/mods/3

Old versions:
https://www.nexusmods.com/finalfantasy9/mods/3?tab=files

Features:

• Widescreen support
  
• Disable/Enable cheats
  
• Fast battle (Custom FPS, skip waiting or turn-based)
  
• Save/Load anywhere (Alt+F5 / Alt+F9)
  
• Edit game data
  
• All of characters available
  
• Easy rope jumping, frog catching, hippaul racing
  
• Change the game font
  
• Export/Import game resources
  
• Volume adjustment for sound FX and music
  
• Many other tweeks

Important:
Update the game to the last version first!

Command line interface:

• Memoria.Patcher.exe - will patch game files using current directory or path from the windows registry
  
• Memoria.Patcher.exe <gameDirectory> - will patch game files using a provided path

First run:

• Run game.
  
• If there is no error you will see "Memoria.ini" file in the game directory.
  
• If something went wrong you will see error in the "Memoria.log"
  
• If you not see "Memoria.log" try to run game with administrator rights
  
• If you see "Sharing violation on path" then close applications that hold this file
  
• If you see "at Memoria.CsvReader.Read" then fix files in the StreamingAssets\Data directory or delete them and patch again.
  
• If the error persists see "\FINAL FANTASY IX\x64(or x86)\FF9_Data\output_log.txt"

Configuration:

• Close the game
  
• Open Memoria.ini via any text editor (notepad for example)
  
• Change "Enable" value from 0 to 1.
  
• Specify other params
  
• Save Memoria.ini
  
• Run the game

Some settings are available in the in-game menu: Ctrl+Alt+Shift + M

Feedback, pull requests and issues are welcome.

Widescreen support
Alt+Space at runtime
https://i.imgur.com/FziaWiV.jpg
https://i.imgur.com/68VdC59.jpg
https://i.imgur.com/9uhVWzW.jpg
https://i.imgur.com/uB9ZYBs.png
https://i.imgur.com/a7v0uIM.jpg

Beatrix:
https://i.imgur.com/uW0BXuI.jpg
https://i.imgur.com/VIXNYuY.jpg

Rope jumping:
https://i.imgur.com/fesXXVn.png

Fast battles:
Custom FPS: https://youtu.be/mD6UmA-BH5M
Skip waiting: https://youtu.be/EqDkhKLHwT0
Turn-based: https://youtu.be/UqY3bhSnKAo

Scripting:
https://youtu.be/cU4T3GSIjxs

Reduce random in the Tetra Master
https://steamhost.cn/steamcommunity_com/groups/ff-modding/discussions/13/357284131804133221/?ctp=22#c133257636769239161

Auto discard in the Tetra Master
https://github.com/Albeoris/Memoria/wiki/Tetra-Master

Manually turn on the trance mode
https://github.com/Albeoris/Memoria/issues/33

Volume adjustment for sound FX and music
https://github.com/Albeoris/Memoria/issues/36

Bypass the Launcher
https://github.com/Albeoris/Memoria/issues/70

Replacing Vivi's regular attack with basic magic
https://github.com/Albeoris/Memoria/wiki/Battle-modifications#viviautoattack

At the moment I move parts of the FF9 engine to the managed DLL. Now, I can replace text, fonts and backgrounds. I use Mono.Cecil for patch DLL.