The translation is not finished, but we decided to release the modification. I hope, this way someone will be able to finish it soon.
For the last few months our translator - Scrdest has been working on the translation. A few days ago he finished module dialogs, that's to say, the main part of the work is done.
Unfortunately, it doesn't mean, the entire translation is finished, because significant parts of the texts are still in polish.
We don't have more time to wait and I decided to release modification in the current version. I hope, this way someone will be able to finish the translation (in that case, please let me know here, so we can update the files).
As concerns playability, you need to try it on your own and decide. I can just say, the first half of the game is translated for the most part and should be playable.