A lot more people have spanish or mandarin as their first language then english. So in terms of native language, enlish is not the most common one. Maybe it's the most common language taught in schools and so on.
Definition of immediate. 1  1a : acting or being without the intervention of another object, cause, or agency : direct the immediate cause of deathb : present to the mind independently of other states or factors immediate awarenessc : involving or derived from a single premise an immediate inference.
The definition of instant is something that is urgent or happens immediately. An example of instant is an answer received very quickly, an instant response. An example of instant is oatmeal that has been pre-cooked and dried for very quick cooking, instant oatmeal. instant. instant.