Forumlar / Cotonti / General / Planning to put Contoni in my language

You need to translate all language files to your language.

Copy all language files and change the language code to yours.
eg. for Dutch: admin.en.lang.php --> admin.nl.lang.php

Translate all text after = between the brackets
Don't change/translate text before =

To know which files see another language package. eg. http://www.cotonti.com/locales/polish_langpack