* The language spoken by people who work in vineyards? In this case, it would depend on the location of the vineyard. For example, in France, French would be the primary language, while in Italy, Italian would be.
* A specific language spoken by a fictional group of people called "Vineyard"? If this is the case, please provide more context.
* The language used to communicate with vineyards? This is a bit of a strange concept, as vineyards are not typically sentient and don't communicate in a language that humans can understand.
Please clarify your question so I can provide a better answer!