we had a backport of fcitx to have it rebuilt against our Qt. otherwise people have a hard time with CJK input. it seems to not have made its way into bionic. a quick look at packaging.neon makes me think it was one of the incorrect forks/ but missed in the move to backports. So, there should be a fcitx backport-bionic made.
this seems resolved?
➜ apt policy fcitx-frontend-qt5 fcitx-frontend-qt5: Installed: 1.1.0-0neon+16.04+xenial+build7 Candidate: 1.2.3-1+18.04+bionic+build3 Version table: 1.2.3-1+18.04+bionic+build3 500 500 http://archive.neon.kde.org/user bionic/main amd64 Packages 1.1.1-1build3 500 500 http://archive.ubuntu.com/ubuntu bionic/universe amd64 Packages 1.1.0-0xneon+18.04+bionic+build2 500 500 http://archive.neon.kde.org/user bionic/main amd64 Packages *** 1.1.0-0neon+16.04+xenial+build7 100 100 /var/lib/dpkg/status