The first thing to do is to locate the settings menu, which is the third button you can click on



At this point, you might think that all you have to do is choose English and save, but doing that will only result in an error message.



To prevent that, you have to choose English and put anything but "Player" in the two textboxes below.



Do so, click on the big blue button, and voila! The game is now in your preferred language

That's all! I hope you find it helpful. Feel free to post any questions you have if something is not clear, and to follow my Steam Curator page if you're looking for more lewd games to play =D