Amadeus.
Amadeus won 8 awards, including Best Picture.
Twlight
PCH answer is Japan
avatar, uP, beauty and the beast, toy story,
Bad and the Beautiful
No German movie has won more than one Academy Award.
Italy
Japan
Titanic was nominated for 14 and won 11 Academy Awards, tying a film made in 1959 for the most Oscars won by a single film.
Silence of the Lambs (1991) won the Big Five Oscars
The French Connection. The French Connection won the most Oscars in 1972 with 5 victories. It is often considered a snub that the The French Connection won over A Clockwork Orange starring Malcolm McDowell.
Italy won the most Oscars for Foreign Language films (10).