@Tamaj , we do not have Polish section as separate language. It's situated here with other languages.

Check these 3 links below.
Langacademy.net-Other-Languages
Langacademy.net-Educational materials
Langacademy.net-Video-Audio

Also, I suggest you to visit these all 4 links below-To learn where the search bars are and other useful stuff:
Langacademy.net-New-Here-Support-Area
Langacademy.net-How-to-post-new-stuff
Langacademy.net-Help-Section AREA
Langacademy.net-Reuploading-Requests AREA