Mark Yuray suggests that communicating exclusively in Latin may be a way to fight the culture’s decay. I tend to agree. Latin is the language used by the builders of both the Roman Civilization and our modern Western Civilization. If we are to commit to rebuilding our civilization, it may be best to start with the material our ancestors used to build it the first time.
One problem, however, is that learning Latin is hard. I would not expect to see a productive conversation in Latin without a coordinated education effort. It would probably take a couple years to develop a minimal ability. At first, the resulting prose will be stylistically poor. But it will improve with time.
Building a city is hard. Building a civilization is harder. Hard things are worth doing.