Are  André Cayatte and William Dieterle of different nationalities?
yes
André Cayatte
André Cayatte (3 February 1909, Carcassonne – 6 February 1989, Paris) was a French filmmaker and lawyer, who became known for his films centering on themes of crime, justice, and moral responsibility.
William Dieterle
William Dieterle (July 15, 1893 – December 9, 1972) was a German actor and film director, who worked in Hollywood for much of his career.
 His best known films include "The Devil and Daniel Webster", "The Story of Louis Pasteur" and "The Hunchback of Notre Dame".
 His 1937 film "The Life of Emile Zola" won the Academy Award for Best Picture.
The Saint and Her Fool
The Saint and Her Fool (German:Die Heilige und ihr Narr) is a 1928 German silent drama film directed by William Dieterle and starring Dieterle, Lien Deyers and Gina Manès.
 It was based on a novel by and premiered at the Capital am Zoo in Berlin.
 Art direction was by Andrej Andrejew.
 For a long time, the movie was considered lost.
 Although never released in the US, a nitrate copy was discovered in Jack Warner's personal vault.
 In 2008 it was given to the UCLA in Los Angeles and restored. Le glaive et la balance
Le glaive et la balance (English: The Sword and the Balance and Two Are Guilty)) is a 1963 French-Italian drama film directed by André Cayatte.
 It was written by Cayatte, Henri Jeanson and Charles Spaak.
 It stars the American actor, Anthony Perkins as the protagonist. The Revenge of Roger
The Revenge of Roger (French: La revanche de Roger la Honte) is a 1946 French historical crime film directed by André Cayatte and starring Lucien Coëdel, María Casares and Paul Bernard.
 The film is based on a novel by Jules Mary.
 It was a sequel to the film "Roger la Honte" also directed by Cayatte which had been shot in 1945 but was released in 1946.
 The film's sets were designed by the art director Jacques Colombier. Les amants de Vérone
Les amants de Vérone (The Lovers Of Verona) is a 1949 French film directed by André Cayatte and loosely based on the William Shakespeare play, "Romeo and Juliet".
 The film was a joint project of Kismet (1944 film)
Kismet is a 1944 Metro-Goldwyn-Mayer film in Technicolor starring Ronald Colman, Marlene Dietrich, Joy Page, and Florence Bates.
 James Craig played the young Caliph of Baghdad, and Edward Arnold was the treacherous Grand Vizier.
 It was directed by William Dieterle, but was not a success at the box office.
 Dieterle had directed Marlene two decades prior in the German silent film "Man by the Wayside", which was both the first role in which Dietrich was cast competitively and Dieterle's directorial debut. Quick, Let's Get Married
Quick, Let's Get Married (also known as The Confession) is a 1964 American comedy film directed by William Dieterle and starring Ginger Rogers, Ray Milland and Barbara Eden.
 It was produced by Rogers' husband William Marshall in an attempt to revive her screen career.
 The film had a troubled production, with original director Victor Stoloff being replaced by Dieterle.
 It sat on the shelf for several years and did not get a full release until 1971. Man by the Wayside
Man by the Wayside (German: Der Mensch am Wege) is a 1923 German silent drama film directed by William Dieterle and starring Alexander Granach, Emilia Unda and Dieterle. Mistress of the World
Mistress of the World (German: "Die Herrin der Welt" , French: "Les mystères d'Angkor" , Italian: "Il mistero dei tre continenti" ) is a 1960 German-French-Italian science fiction-spy film directed by William Dieterle and starring Martha Hyer and Carlos Thompson.
 It marked the comeback in his native country of the director William Dieterle after several decades spent in Hollywood.
 In West Germany it was released in a longer version split in two parts ("Die Herrin der Welt - Teil I" and "Die Herrin der Welt - Teil II").