one.
A lot of the time we use the same words in the same language but the underlying assumptions we both make are radically different.

Leaving out esoteric ones like bloom, rod, billet, wap, concepts such as event or order are open to all sorts of semantic freight.

In fact knowing you are talking to someone from a different culture witha different native tongue, might make you think through those assumptions.
So you donlt foollishly think a list of windows events and their delegates is something to do with a double glazing promotion....