First we Feast sees celebrities reveal personal details about themselves while eating increasingly spicy chicken wings.
The interviewer asked the Benoni-born actress to give him a two-minute Afrikaans lesson.
Theron then teaches him an Afrikaans children's poem, as well as some "nasty" swearing. Watch out for that from around 1'15".
The Benoni-born actress' latest movie, Gringo, premiered earlier in the month.
Please note this video contains strong language that may be offensive to some.
