It seems that you're using an outdated browser. Some things may not work as they should (or don't work at all).
We suggest you upgrade newer and better browser like: Chrome, Firefox, Internet Explorer or Opera

As per subject. I want to listen to the game in my native Polish, but stream to friends with English UI.
No posts in this topic were marked as the solution yet. If you can help, add your reply
First make a copy of the files mentioned below.

Go to the lang folder (in the game directory), copy and overwrite dialog.tlk from the en_US folder to the pl_PL folder.

Select the Polish language in the game.

All dialogue text, and tooltips will be in English. The rest of the sounds and some UI text will be in Polish.

I hope this works ;).