How did sedeo, sedere supplant some forms of sum, esse in Vulgar Latin?

1. How did Vulgar Latin differ from Classical Latin?
2. What is the history of Vulgar Latin?
3. Is Vulgar Latin spoken today?

How did Vulgar Latin differ from Classical Latin?

The answer usually given is that Vulgar Latin was the language of the people, while Classical Latin, coming down to us as a literary language, was closer to how the elite spoke.

What is the history of Vulgar Latin?

Vulgar Latin was the everyday form of Latin that was spoken by the common people (the vulgus) of the Roman Empire. It was the language of soldiers, merchants, farmers, workers, rather than the language of scribes, poets, historians and politicians.

Is Vulgar Latin spoken today?

Latin is an old language that was spoken by the Romans. Vulgar Latin is not spoken anymore, but its many dialects eventually became what are now Romance languages (such as Italian, Spanish, French, Portuguese, and Romanian).