Birth to a Seychellois parent creates citizenship. Birth in Seychelles alone to two foreign parents is not unrestricted jus soli.
Sources: Seychelles ICS - permanent resident and citizenship FAQ
A child of a Seychellois citizen parent is a citizen under constitutional and nationality rules.
Sources: Seychelles ICS - permanent resident and citizenship FAQ
Ordinary naturalization generally needs about fifteen years aggregate residence, a citizenship exam (about 80 percent in Creole, English, or French), and good character. Marriage tracks use different residence and marriage-length conditions. Grant is discretionary.
Sources: Seychelles ICS - permanent resident and citizenship FAQ