Yes it's an evolution of different languages foreign and regional but to simplify it as the first to use it is nonsense.
How could we be the first to use it if it didn't exist. It was created by the English using what was around and standardised over time to form what we use today.
It was created on English shores hence the name of the Language is English. Someone didn't spot it sticking out of the ground when out looking for buried Saxon gold and decided to use it.
Most languages are formed the same way but no-one nit picks over them like they do with English.







