To change the in-game language...
- Login to the Steam client
- Within Library, right-click on Space Colony and select Properties
- Select the Language tab and choose a language from the dropdown list
- Close the Properties box and run the game as normal
NOTE: To change the language used in the Space Colony Launcher use the language dropdown within the Launcher. This does not affect the language used in-game. To change the language in-game use the instructions above.