How does Dangaremba present colonization in Nervous Conditions?

Both Nyasha and her brother, Chido, have spent their childhood in England and therefore, have developed many Western values. Tambu's mother thinks that Nyasha's bulimia and subsequent mental breakdown are a result of her exposure to Western culture, or "Englishness" and is afraid of the same thing happening to her daughter. This "Englishness" initially drives a wedge between Tambu and Nyasha. Nyasha and Chido cannot speak Shona, and Tambu cannot speak English - nor does she approve of Nyasha's revealing clothing. When Tambu moves to the mission, she has a much easier time obeying Babamukuru than Nyasha, and is often appalled at Nyasha's insolence. However, while looking back and telling her story, Tambu is able to recognize the way the colonial education system created a culture of subjugation - where Africans learned to believe that they were inferior, and then aspired to live by Christian values.