Hello there!
You have mentioned that you are using a non-purchased copy of the game. Due to this, we cannot confirm the contents of the installation and are unable to provide support on the matter. The copy you have acquired may or may not have had files altered or removed which could affect how it is installed. For example, your log file assumes it is loading a Bulgarian language file which is not one of the languages included with
A Machine For Pigs.
Like Mudbill previously stated, option 1, which is to verify the game's integrity via Steam, is another way of saying "Reinstall the game". Beyond that, there are no more options we can provide since
piracy is not something we support.
Please consider purchasing the game at one of the following sources.