Seems there's a font issue since they didn't bother translating the Font Name and it's not resolving correctly.
Code:
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That Time I Got Reincarnated as an Orc (F7: Volume Setting F12: Return to title)
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未找到默认字体。
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OK
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Translation:
Default font not found.
Fix
Script: セーブ画面
Line 272
self.contents.font.name = "MS PMincho" # "MS P明朝"
Script: フォント変更
Line 2
Font.default_name = "Ume Gothic S4" # "梅ゴシックS4"
This can be installed if the end user decrypts Game.rgss3a and overwrites the "Data\Scripts.rvdata2" file along with added the missing font to the "Fonts" folder.
Use
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to decrypt the game.
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Searching for MS P明朝 (TrueType) lead me to this MSPMINCHO.TTF
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Though just putting that Japanese Font in the font folder didn't resolve the issue so then I looked to see what fonts the scripts were looking for and changed their respective names to the English ones in the font files.
Not sure if you want to throw them a bone on Steam with the solution to their problem but it's here
Edit: In Script Game_System changed "japanese?" to return false.
Line 38
Code:
def japanese?
false
# $data_system.japanese
end