Hi,
Add in your url browser the following relative url:
<your sharepoint site>/_layouts/settings.aspx
now you are in the main settings of your site collection at this point select language to change it "I don't know in Polish what is the corrispective, use google translate":
After this, you can specify an alternative language and press save to confirm.
Keep in mind if you don't see "Language Settings" you don't have enough permission to perfom this operation.
Giuliano De Luca - MCSD SharePoint, MCSD Web Applications, MCPS, MS. www.delucagiuliano.com Twitter: @giuleon Please Mark As Answer if my post solves your problem or Vote As Helpful if the post has been helpful for you.