[Bug]: Even if cjkfonts are installed, the unity game still cannot display cjk.

[D0735]

Describe the bug

For example:https://m-iden.itch.io/electric-trains.

To Reproduce

Download ElectricTrains.v0_827_Standalone_WIN.zip and then unzip and execute Electric Trains.exe.

Package

Flatpak from Flathub

Distribution

Fedora 41

Debugging Information

Official Package: true
Version: '51.17'
DE/WM: plasma
Display:
    X.org: true
    X.org (port): :0
    Wayland: true
Graphics:
    vendors:
        nvidia:
            vendor: nvidia
            envs:
                __NV_PRIME_RENDER_OFFLOAD: '1'
                __GLX_VENDOR_LIBRARY_NAME: nvidia
                __VK_LAYER_NV_optimus: NVIDIA_only
            icd: /usr/lib/x86_64-linux-gnu/GL/vulkan/icd.d/nvidia_icd.json
            nvngx_path: /usr/lib/x86_64-linux-gnu/GL/nvidia-565-77/extra/nvidia/wine
    prime:
        integrated: null
        discrete: null
Kernel:
    Type: Linux
    Version: 6.12.6-200.fc41.x86_64
Bottles_envs: null

Troubleshooting Logs

No response

Additional context

No response