Le Baron wrote:True indeed and before Wolfgang Handel ditched Italian for English; probably to please his new audience. What a trailblazer.
Do you mean George Friedrich Handel?
I went to look up more info, because I'm a nerd, and, surprisingly to me, Reinhard Keiser started writing operas in German in the 1690s. Mozart was just the first to make German popular, as Handel was the first to make English popular.
Edited to correct spelling.