Afrikaans often uses is + weg to describe a state or result: the bus is gone / away / no longer here.
So Die bus is weg does not focus on the action of leaving. It focuses on the fact that the bus is already gone.
Compare the ideas:
This is very natural Afrikaans.
Because Afrikaans and English are both Germanic languages, they often share basic sentence patterns, especially in simple main clauses.
Here the structure is:
So the pattern is basically:
That direct similarity is very common in simple Afrikaans sentences.
Yes. A very literal translation is The bus is away, but in natural English the usual meaning is often better expressed as:
If someone is waiting for it, the idea is probably:
So gone is often the best English equivalent in context, even though weg by itself can also mean away.
Usually it implies that the bus is not here anymore, and in many situations that naturally suggests it has left.
But the sentence itself mainly describes the current situation, not the exact way it happened.
So the emphasis is:
not necessarily: