$ sudo apt-get update
$ sudo apt-get install fcitx-imlist 

fcitx-imlist is installed in your system.

Make ensure the fcitx-imlist package were installed using the commands given below,

$ sudo dpkg-query -l | grep fcitx-imlist *

You will get with fcitx-imlist package name, version, architecture and description in a table

fcitx-imlist package basic information: