Generate text that refutes this claim: Colonial legacies: the issue of language  A fundamental restriction to achieving universal education in several African countries is not teachers, as a resource, but rather the lack of a national language. Colonialism enforced national boundaries, of which remain mismatched to ethnicity and language. African nations remain some of the most diverse in the world. With the exception of Tanzania, whereby Julius Nyerere used policy to create a sense of national unity and language, many African nations placed minimal focus on nationalisation. Around 46 languages are spoken in Zambia.  Such language diversities make universal education difficult. Therefore, presidents such as Paul Kagame, have the right approach of enforcing a national language.
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Proposals for basing education, and teaching, on a universal language raise criticism. Will students be able to ask for assistance at home and amongst their community if the language taught is not understood? Does enforcing a national language return to unequal relations of power - overriding the history and ethnic diversity of said nation? Shouldn’t national governments be more sensitive to local communities and group identities? Finally, what language will be chosen, and how will the decision be made? The implementation of a national language introduces a risk of conflict in unstable countries.  It also needs to be remembered that a national language has to be taught; something which requires investment in teachers.