What language did Duncan Heyward speak to the Huron?

Duncan Heyward, the character from James Fenimore Cooper's novel "The Last of the Mohicans," spoke French to the Huron.

Here's why:

* Historical Context: During the time period of the novel (1757), French was the language of diplomacy and trade with the Huron (also known as Wyandot) people. The French had established strong alliances with them, and many Huron people were fluent in French.

* Character Background: Heyward, as a British officer, was likely familiar with French, as it was the language of diplomacy and military communication in North America at the time.

Therefore, it is safe to assume that Heyward used French when communicating with the Huron.