The 0.127 update is here and it introduces an experimental translator that will automatically translate the game into up to 14 new languages. Here are the ones supported so far:

• Spanish
  
• Portuguese
  
• Russian
  
• Chinese (Simplified)
  
• Japanese
  
• German
  
• French
  
• Polish
  
• Turkish
  
• Korean
  
• Thai
  
• Italian
  
• Ukrainian
  
• Norwegian
  

I suspect the translations will be far from perfect but it should be infinitely better than nothing for those players who can't read English well.

For any bilingual players out there, let me know how far from perfect the translations actually are. If they turn out good I might be able to mark the game as officially supporting those languages on Steam which would really help our foreign monolingual friends find the game.

Happy stacking!

-Unstackd