How many films starring Michael Caine had the name of an African people as their title?

Sir Michael Caine (born Maurice Joseph Micklewhite, 14 March 1933) is an English actor, who has appeared in more than 160 films over seven decades. He has received multiple honours including two Academy Awards, a BAFTA Award, three Golden Globe Awards, and a Screen Actors Guild Award. Caine is one of very few actors to have been nominated for an Academy Award for acting in five different decades. There are two of his films that fit the description in the question.

“Zulu” is a 1964 epic war film taking its name from an ethnic group of southern Africa. Starring Stanley Baker, Jack Hawkins and Ulla Jacobsson along with Michael Caine, it depicts the Battle of Rorke's Drift between the British Army and the Zulus in January 1879, during the Anglo-Zulu War. It shows how 150 British soldiers, 30 of whom were sick and wounded patients in a field hospital, successfully held off a force of 4,000 Zulu warriors.

“Ashanti” is a 1979 adventure film taking its name from an ethnic group in West Africa. Directed by Richard Fleischer it starred Peter Ustinov, Kabir Bedi, Beverly Johnson, Omar Sharif, Rex Harrison, and William Holden alongside Caine. It is based on the 1974 novel “Ébano” by Alberto Vázquez-Figueroa, with a screenplay written by Stephen Geller and George MacDonald Fraser. The story is set against the background of modern-day slave trading, with a man who takes on a perilous journey in order to find his beautiful wife, who has been kidnapped by brutal slave traders.