How did you add your Windows fonts? If you installed them to your home directory, you should be able to find them in /home/deck/.fonts and just delete them.
As a rule, system-wide fonts are stored in /usr/share/fonts/ and user-specific ones in /home/deck/.fonts/. Additionally, some user-specific font settings are stored in /home/deck/.config/fontconfig/fonts.conf.
So you're free to delete everything in /home/deck/.fonts/. You may need to hop into game mode and back again (or reboot) to have changes apply.
Steam OS 字體直接安裝ttf的失誤,改回方式
So you're free to delete everything in /home/deck/.fonts/. You may need to hop into game mode and back again (or reboot) to have changes apply.
/home/deck/.local/share/Steam/steamapps/compatdata/1638230/pfx/drive_c/windows/Fonts/
此路徑可從Steam遊戲庫點選該遊戲之「瀏覽本機檔案」,再往上一層到compatdata找尋1638230資料夾,點進內部的虛擬C槽→windows 資料夾→Fonts後放入字體,解決