Question Problem with language

After one upgrade changed my forum language- some things on front forum. Before was polish, now is english, i have been look everywere to be find how change to again to polish. Please help me !

exaxple:





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Database collation check: The collation of your table fields are correct

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htaccess: Exists | PHP environment: Max execution time: 30 seconds | Max execution memory: 256M | Max file upload: 64M

Joomla default template details : sportline2 | author: Youjoomla LLC | version: 1.0 | creationdate: 10-15-08

Kunena default template details : Reddy | author: gonzaunit | version: 1.6.0 | creationdate: 2010-07-04

Kunena version detailled: Installed version: 1.6.5 | Build: 5005 | Version name: Babel | Kunena detailled configuration:

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[th]Kunena config settings:[/th]

board_title	Wędkarstwo wyczynowe - forum Matchfishing.pl
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Third-party components: UddeIm: The file doesn't exist Array.xml !

Third-party SEF components: AceSEF: The file doesn't exist acesef.xml !

Plugins: System - Mootools Upgrade: Disabled | System - Mootools12: Disabled | Kunena Discuss 1.6.4

Modules: Kunena Latest 1.6.4 | Kunena Login 1.6.2

See Where is the language file?

I have been copy file from this file

\pl-PL.com_kunena-site.zip

to language\pl-PL\

and now is OK!!!