Birth to a Tanzanian parent creates citizenship. Birth in Tanzania alone to two foreign parents is not treated as open jus soli in practice.
Sources: Tanzania Immigration - citizenship by naturalization
The foreign wife of a Tanzanian may register on request.
Sources: Tanzania Immigration - citizenship by naturalization
A child of a Tanzanian citizen parent is a citizen by descent under the Citizenship Act.
Sources: Tanzania Immigration - citizenship by naturalization
Adults need twelve months residence immediately before application and at least seven years aggregate residence in the preceding ten years, plus language, character, and intention to remain. Adults generally may not retain another nationality. Grant is discretionary.
Sources: Tanzania Immigration - citizenship by naturalization