Unfortunately, if storage fails (I use non persistent browser settings to reduce web fingerprinting) -- the language option seems to not be displayed after this message 
I was also unable to find a way to change the language (tried all buttons in sprocket-icon settings)
However, even without being able to understand the game -- I can see a lot of effort has gone into this, and that an interesting simulation game must be underneath. I like seeing the little people go about their tasks even if I do not know what they are doing :)