To say Kenyan police cannot speak english, is certainly not true. Truth is, while it’s uncommon, English and Swahili are the official languages of Kenya. About 16 percent of the population have some competence in English. Swahili is spoken as a first language mainly in coastal areas, but is spoken as a second language by almost 70 percent of Kenyans.
According to Ethnologue, there are a total of 68 languages spoken in Kenya. This variety is a reflection of the country’s diverse population that includes most major ethnoracial and linguistic groups found in Africa. So, we guess the low english population (%16) is why it feels as though Kenyan police can’t speak english.