Well, most of Europe anyway, Europeans use Semitic letters. It's a whole other story with Middle-Eastern and Asian countries, they use their own. Then there are the writing systems of the Americas, Africa, and Australia.

No. Anyway, Semitic peoples live on Middle East, and Arabians for example, use foriegn, Aramaic based abugid. Also Copts use Greek alphabet. All this insisting on "native" script is silly.
Oh, dont forget Coreans and Japanese use Chinese script. Also Vietnamese. Indian devanagari script traces origins to Persia, and ultimately to Phoenicians.