Question

who was the first person to speak English.

Answer 1

There was no first person to speak English, English is a language that has evolved from many different languages like it has accepted words from French, Spanish, even Hindi. It was first spoken by people living in England known as Angels.

Answer 2

English was first spoken by people of England. England was inhabited by people from central Asia and central Asian people were from Africa's rift valley.
English is derived from Latin from Sanskrit.
So the first English words would have been spoken by Aryans of Vedic Age.