Tens of thousands of English-speaking Cameroonians have fled the country ahead of the presidential vote
		
	 
	
		
		Some human rights activists worry that Cameroon could be the site of Africa’s next civil war
		
	 
	
		
		Since anglophone separatists declared independence last October, dozens of people have gone missing
		
	 
	
		
		The filmmaker’s focus on the banal and routine drew attention to the people, their languages and practices