$ sudo apt-get update
$ sudo apt-get install maliit-keyboard-data 

maliit-keyboard-data is installed in your system.

Make ensure the maliit-keyboard-data package were installed using the commands given below,

$ sudo dpkg-query -l | grep maliit-keyboard-data *

You will get with maliit-keyboard-data package name, version, architecture and description in a table

maliit-keyboard-data package basic information: