Hardly any pidgin or creole speaking country is part of the Hague Convention Abolishing the Requirement of Legalization for Foreign Public Documents (Apostille Convention). You can read about this in this list.
The authorities of the country in which the document was issued are responsible for the legalization and procurement of documents, i.e. German authorities for German documents and, for example, Nigerian authorities for Nigerian documents.
For more information on legalization and obtaining documents from countries such as Nigeria or Cameroon, please contact the respective embassies.