In “the notorious jumping frog of calaveras county” by mark twain, why does twain use dialect when wheeler tells the story?

Twain uses the dialect when Wheeler tells the story so that the reader can separate and identify characters and narrator. The dialect intensifies some stereotypes and thereby separates the character from the narrator.

Explanation:

The story of “The Notorious Jumping Frog of Calaveras County” is a short story, where the narrator will report a visit he made to a friend, whom he will refer to as the "chatterer."

He finds his friend napping in a tavern, but soon he wakes up, and then, during the conversation, asks about a person who was his friend's friend. Then he suspects that his friend told him to ask about this person, just so that the chatterer could tell him the "devilish memory."

The short story often presents the use of the dialect as a way of emphasizing the exaggerated qualities of the characters and separates the narrator from the story.

appeal to ethos is your answer.