Sharlto Copley presented an American, an Eastern European, and a British "version" of Kruger to Neill Blomkamp before they agreed that Kruger would be from their home country, South Africa, and speak with the accent of "a very specific area in Johannesburg". Accordingly, Kruger's men are played by fellow South Africans Brandon Auret (who also appeared in Blomkamp's movie Sector 9 (2009) with Copley) and Josh Blacker. They all incorporate numerous Afrikaans slang words into their dialogue, e.g. "Boet," an informal derivative of "brother," "Boykie," meaning "little boy," and "lekker," a slang for approval.
In 2015, director Neill Blomkamp expressed his dissatisfaction with this film in an interview shortly before the release of Chappie (2015). He claimed to have felt that he could've delved further into the film's story.
The line, "Don't breathe on me... Cover your mouth!" spoken by John Carlyle to the Plant Manager was ad-libbed by William Fichtner.
The biography of John Carlyle displayed by the computer indicates that he was born in 2010, which makes him about 144 years old.
When Kruger retrieves the rocket launcher from his vehicle, the name of the agency he is working for is seen-- the "Civil Cooperation Bureau." The South African Civil Cooperation Bureau (CCB) was a government-sponsored, under cover, direct action intelligence agency during the apartheid era.