I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "14% of the population speaks the official language Portuguese, the language of government and national communication during centuries of colonial rule. 44% speak Kriol, a Portuguese-based creole language, which is effectively a national language of communication among groups. The remainder speak a variety of native African languages unique to ethnicities."? 

Based on the facts presented in the passage, we can safely assume that which non-african language is younger?