$ sudo apt-get update
$ sudo apt-get install hyphen-hyphenation-patterns-lt

hyphen-hyphenation-patterns-lt is installed in your system.

Make ensure the hyphen-hyphenation-patterns-lt package were installed using the commands given below,

$ sudo dpkg-query -l | grep hyphen-hyphenation-patterns-lt*

You will get with hyphen-hyphenation-patterns-lt package name, version, architecture and description in a table

hyphen-hyphenation-patterns-lt package basic information: