Mediaeval Latin.
The symbol E first appears in Phoenician writing. It stood for the H sound.
We take the letter "e" from the Latin alphabet, which in turn had its roots in the Greek alphabet. The Greek letter epsilon is much the same in appearance and function as the Latin e.
greek
Greek
The Ancient Greeks were the first people to speak Greek.
greek language
Greek is a very old language , and the chances that the greek language was first spoken in Greece, and then taken around other countries by Alexander the great , on his many battles.
There is no such thing as an "epsilon star". There are several stars that have "epsilon" in their names; basically one for every constellation, so "Epsilon" followed by the genitive for example, Epsilon Eridani, Epsilon Crucis, Epsilon Canis Maioris, etc.
greek
They speak Greek.
The motto of Delta Psi Epsilon is 'The Sorority that Puts God First'.
The correct answer is Greek. :)