I think you make a good point, but there seems to be more to the OP's events and operations than you suggest. The 'events' are implied to be broadcast versus 'messages' which are sent to a particular object (i.e. point-to-point) in languages that I know.

The OP is also suggesting a hierarchy of 'operations', with sub-operations communicating with the parent operations. I don't think this maps directly onto language features (again, in languages I'm aware of).

I'd be interested to hear which languages you had in mind, and some more detail on how you envisage the mapping to language features.