How do I intall I18N

[MrGen]

I am very confused. I tried reading and understanding the direction provided but The zip has

I18N_base folder
I18N_common folder
I18N_navigation folder
I18N_base.php
I18N_navigation.php

I do not know where to install in? Direction do not seem to be updated mentioning those files above. I am trying to get submenu to working at bettylineclc.com

Thanks