Plan research in Guinea-Bissau.

Portuguese is the official language and used for government and formal documents, but Kriol is the practical lingua franca for many interviews. Balanta, Fula, Mandinka and other languages matter by region. Translation should not assume Portuguese comprehension; instruments usually need Portuguese source text, Kriol interviewer wording and local-language support for rural clusters.

Bissau is the largest urban center and administrative hub, while Bafata, Gabu and regional towns carry smaller populations. Much of the population lives in rural mainland communities and island areas such as the Bijagos. National samples need Bissau separated from regions and islands; targeted studies should define ethnic, livelihood or coastal access boundaries.

Mobile access supports phone contact, but internet surveys are limited to connected urban groups. Face-to-face work is shaped by rainy-season roads, river or boat travel, island access and local authority coordination. Public, health or NGO-linked studies commonly need ministry or ethics clearance. National fieldwork often requires three to five weeks, with extra time for islands.

Fieldwork notes compiled from public sources by Surveysphere Africa; confirmed with our in-country partner before a study starts.