FCITX5 doesn't work QT apps under X11 on Arch Plasma

[HubKing]

It works for both GTK and QT apps in the Wayland session. But if I log into the X11 session, it only works on GTK apps like FireFox, but not on QT apps like KWrite or the System Settings. How to fix?

fctix5-qt6 package has been installed.

[wengxt]

Under X11 you'd better have QT_IM_MODULE=fcitx if you have unset it per wayland self diagnose notification.

You can run fcitx5-diagnose to verify.

[HubKing]

Adding export QT_IM_MODULE=fcitx to ~/.xprofile and rebooting the PC solved it.