The Corpus Africa, a comparable corpus of the 5 African varieties of Portuguese, is now available for research at the platform CQPweb (http://alfclul.clul.ul.pt/CQPweb/ca/). The menu "restricted query" allows you to narrow down your research by country, modality (Written/Oral) and type of text (Oral/Written). The corpus has notes on morfosintatic categories (POS). 

More information about this corpus available on the associate project's page.