Simplify the following text for a Grade 10 native English-speaking person.
Original: Leet ( or `` 1337 '' ) , also known as eleet or leetspeak , is an alternative alphabet for the English language that is used primarily on the Internet .
Simplified: Leet ( or `` 1337 '' ) , also known as eleet or leetspeak , is another alphabet for the English language that is used mostly on the internet .