...or at least my best guess at the nationality where it might be vague. Also, multinational productions were reduced to a single nationality (I feel so impure). Please let me know of any mistakes; I'm sure there are a few. As has been discussed, nationality can be quite vague, as in the recent LOTR films that were based in New Zealand with lots of UK actors and American money (from a multinational corporation).
BUT, for what it's worth, here's the list. I *will* be making a language-list soon that might be more useful
Australia (1)
The Year Of Living Dangerously (1982); (117m) | Peter Weir
Finland (1)
The Man Without A Past (2002); (97m) | Aki Kaurismäki
Germany (1)
Wings of Desire (1987); (127m) | Wim Wenders
Hungary (1)
Werckmeister Harmonies (2000); (145m) | Ágnes Hranitzky and Béla Tarr
Taiwan (1)
Yi Yi: A One and a Two (2000); (173m) | Edward Yang
Iran (2)
Close-Up (1990); (100m) | Abbas Kiarostami
The Wind Will Carry Us (1999); (118m) | Abbas Kiarostami
Canada (2)
Jesus of Montreal (1989); (118m) | Denys Arcand
The Sweet Hereafter (1997); (112m) | Atom Egoyan
Japan (3)
To Live (1952); (143m) | Akira Kurosawa
Tokyo Story (1953); (136m) | Yasujiro Ozu
Sansho the Bailiff (1954); (120m) | Kenji Mizoguchi
Sweden (4)
The Seventh Seal (1957); (96m) | Ingmar Bergman
Wild Strawberries (1957); (91m) | Ingmar Bergman
The Sacrifice (1986); (143m) | Andrei Tarkovsky
Songs From the Second Floor (2000); (98m) | Roy Andersson
Poland (4+)
The Decalogue (1987); (55m each) | Krzysztof Kieslowski
Three Colors: Blue (1993); (100m) | Krzysztof Kieslowski
Three Colors: White (1994); (91m) | Krzysztof Kieslowski
Three Colors: Red (1994); (99m) | Krzysztof Kieslowski
Denmark (5)
Day of Wrath (1943); (93m) | Carl Theodor Dreyer
The Word (1955); (126m) | Carl Theodor Dreyer
Babette's Feast (1987); (102m) | Gabriel Axel
Breaking The Waves (1996); (159m) | Lars von Trier
Dogville (2003); (177m) | Lars von Trier
USSR (5)
Andrei Rublev (1969); (205m) | Andrei Tarkovsky
Solaris (1972); (165m) | Andrei Tarkovsky
Dersu Uzala (1975); (141m) | Akira Kurosawa
The Mirror (1975); (108m) | Andrei Tarkovsky
Stalker (1979); (163m) | Andrei Tarkovsky
Italy (7)
Open City (1945); (100m) | Roberto Rossellini
The Bicycle Thief (1948); (93m) | Vittorio De Sica
La Dolce Vita (1960); (174m) | Federico Fellini
The Gospel According to Matthew (1964); (137m) | Pier Paolo Pasolini
Jesus of Nazareth (1977); (371m) | Franco Zeffirelli
Life is Beautiful (1997); (116m) | Roberto Benigni
Not of This World (1999); (100m) | Giuseppe Piccioni
UK (9)
A Man for All Seasons (1966); (120m) | Fred Zinnemann
Life of Brian (1979); (94m) | Terry Jones
The Elephant Man (1980); (124m) | David Lynch
Chariots of Fire (1981); (123m) | Hugh Hudson
The Mission (1986); (126m) | Roland Joffé
Henry V (1989); (137m) | Kenneth Branagh
Shadowlands (1993); (131m) | Richard Attenborough
Secrets & Lies (1996); (142m) | Mike Leigh
The Miracle Maker (2000); (90m) | Derek W. Hayes and Stanislav Sokolov
France (11)
The Passion of Joan of Arc (1928); (110m) | Carl Theodor Dreyer
The Diary of a Country Priest (1951); (110m) | Robert Bresson
A Man Escaped (1956); (99m) | Robert Bresson
Balthazar (1966); (95m) | Robert Bresson
My Night at Maud's (1969); (110m) | Eric Rohmer
Jean de Florette (1986); (120m) | Claude Berri
Manon of the Spring (1986); (113m) | Claude Berri
Ponette (1996); (97m) | Jacques Doillon
La Promesse (1996); (90m) | Jean-Pierre and Luc Dardenne
Code Unknown (2000); (118m) | Michael Haneke
The Son (2002); (103m) | Jean-Pierre and Luc Dardenne
USA (51)
Sunrise: A Song of Two Humans (1927); (95m) | F.W. Murnau
It's A Wonderful Life (1946); (130m) | Frank Capra
On The Waterfront (1954); (108m) | Elia Kazan
The Night Of The Hunter (1955); (93m) | Charles Laughton
2001: A Space Odyssey (1968); (139m) | Stanley Kubrick
Star Wars (1977); (121m) | George Lucas
Days of Heaven (1978); (95m) | Terrence Malick
The Empire Strikes Back (1980); (124m) | Irvin Kershner
Peter and Paul (1981); (190m) | Robert Day
Blade Runner (1982); (117m) | Ridley Scott
Return of the Jedi (1983); (134m) | Richard Marquand
Tender Mercies (1983); (92m) | Bruce Beresford
Amadeus (1984); (180m) | Milos Forman
Witness (1985); (112m) | Peter Weir
Bad Lieutenant (1987); (98m) | Abel Ferrara
The Last Temptation Of Christ (1988); (164m) | Martin Scorsese
Crimes And Misdemeanors (1989); (107m) | Woody Allen
Grand Canyon (1991); (134m) | Lawrence Kasdan
Unforgiven (1992); (131m) | Clint Eastwood
Schindler's List (1993); (197m) | Steven Spielberg
Fearless (1993); (122m) | Peter Weir
Groundhog Day (1993); (101m) | Harold Ramis
Vanya on 42nd Street (1994); (119m) | Louis Malle
The Shawshank Redemption (1994); (142m) | Frank Darabont
The Addiction (1995); (82m) | Abel Ferrara
Dead Man Walking (1995); (122m) | Tim Robbins
The Apostle (1997); (134m) | Robert Duvall
The Last Days of Disco (1998); (113m) | Whit Stillman
The Truman Show (1998); (103m) | Peter Weir
The Prince Of Egypt (1998); (99m) | Brenda Chapman, Steve Hickner, and Simon Wells
The Straight Story (1999); (112m) | David Lynch
Dogma (1999); (130m) | Kevin Smith
American Beauty (1999); (122m) | Sam Mendes
Fight Club (1999); (139m) | David Fincher
The Sixth Sense (1999); (107m) | M. Night Shyamalan
The Big Kahuna (1999); (90m) | John Swanbeck
The Matrix (1999); (136m) | Andy and Larry Wachowski
Magnolia (1999); (188m) | Paul Thomas Anderson
Waking Life (2001); (99m) | Richard Linklater
Hell House (2001); (85m) | George Ratliff
13 Conversations About One Thing (2001); (104m) | Jill Sprecher
The Lord of the Rings: The Fellowship of the Ring (2001); (208m) | Peter Jackson
The Lord of the Rings: The Two Towers (2002); (223m) | Peter Jackson
Stevie (2002); (140m) | Steve James
Signs (2002); (106m) | M. Night Shyamalan
Changing Lanes (2002); (99m) | Roger Michell
Punch-Drunk Love (2002); (95m) | Paul Thomas Anderson
The Lord of the Rings: The Return of the King (2003); (251m) | Peter Jackson
Eternal Sunshine of the Spotless Mind (2004); (108m) | Michel Gondry
The Passion Of The Christ (2004); (127m) | Mel Gibson