Final answer:
The Greek language originated around 800 - 750 BCE, and Koine Greek manifested in the 1st century A.D.
Step-by-step explanation:
The Greek Language: Origin and Manifestation
The Greek language originated around 800 - 750 BCE. During this time, the Ionian Greeks developed their own syllabic alphabet based on the Phoenician version, which led to the revival of literacy and the recording of literature, poetry, and drama. This form of Greek, known as Koine Greek, manifested in the 1st century A.D. and served as the basis for the alphabets used in all Latinate European languages, including English.