My Settings -> Preferences -> Prefernce Options ( http://lithosphere.lithium.com/t5/user/myprofilepage/tab/user-preferences )
The "Language" dropdown offers a language labelled "key" which turns every string into it's string key, similar to the studio's Toolbelt. Not sure if this should be on Lithosphere production 🙂
Great catch, thank you for reporting it!
Will make sure that gets fixed.