It seems to me that the issues on that page are Wayland-specific; anectotally, on my random X window manager works fine with Fcitx (except for Emacs, but that's

It seems to me that the issues on that page are Wayland-specific; anectotally, on my random X window manager works fine with Fcitx (except for Emacs, but that's probably Emacs' fault, not the IME protocol's).