$ sudo apt-get update
$ sudo apt-get install fcitx-table-translit 

fcitx-table-translit is installed in your system.

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

$ sudo dpkg-query -l | grep fcitx-table-translit *

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

fcitx-table-translit package basic information: