Simplify the following text for a Grade 7 native English-speaking person.
Original: Wikipedia was formally launched on January 15 , 2001 , as a single English-language edition at www.wikipedia.com , and announced by Sanger on the Nupedia mailing list .
Simplified: Wikipedia was launched on January 15 , 2001 . It was launched as an English-language edition at www.wikipedia.com , and announced by Sanger on the Nupedia mailing list .