Unfortunately, we've been unable to reproduce this on our end. While it's possible there may be an incompatibility with your current set up and our game, we're not able to immediately identify the issue. If you could leave some details about your system, including make and model of your processor, graphics card and graphics driver with version, and operating system, we may be able to use the information to identify it and other issues in the future.
Have you checked the font in the folders of the game? It should be located in game/gui/font and called Varela. Install that font and check whether it's working in a word program.
And again, please check whether it's your GPU / graphics card having a problem and if it's up-to-date. Also which EXE are you running? We have a 64 and 32 EXE and you might run the wrong one on your machine.
More suggestions are to open the accessibility menu with A and check if the default font shows correctly.