Tabs Manager update

In the "com_tabs_manager_gk3_J15!" when I go into the component/Update from 3.0.0 to 3.0.1 and open the READ_IT_FIRSIT!!!.txt it says:

To update Tabs Manager - please replace all files (remember about language directory placed in /language/en-GB/) and please run in phpMyAdmin or MySQL console SQL query from update.sql file.

Please rememeber about changing "#__" prefix in SQL query to your database table suffix.

I understand everything but the language part. What language files do I need to replace?