Irene Dunne performs a musical number in blackface with many men in blackface accompanying her.
A woman performs in black face.
No swear words.
"Goshamighty!" is used instead of "Godamighty!"
The term "darkies" is used twice, but that is an outdated racial term, not a profanity. The term "niggers", which is heard in the stage version of the play, is not used in the film.
A black woman is referred to as, "eight ball" by a disrespectful man. The term most definitely refers to the woman's skin color.