This can easily be solved by a simple compromise. When disabling the 'UI levity', also switch the primary interface labels to show generally understandable counterparts such as Tasks, Wiki, Code Review, Continuous Integration, UI Mockups, etc. :-)

Keep the names, they are great, it is the UI and onboarding process that is confusing. This amounts to repeated struggle while each new user has to grasp the idiosyncratic naming conventions.