Guide

Turkey – Citizenship

Turkey provides several pathways to citizenship, among them naturalisation following five consecutive years of lawful residence, a marriage-based route requiring three years of union with a Turkish national, citizenship through descent, and a citizenship-by-investment scheme. Turkish law broadly accommodates dual

Taiwan – Citizenship

Taiwan (officially the Republic of China, or ROC) grants citizenship primarily through naturalisation following a qualifying period of residency, through descent from a Taiwanese parent, or via marriage to a Taiwanese national. For the majority of foreign applicants, naturalisation demands

Thailand – Citizenship

Acquiring Thai citizenship is possible through naturalisation after five years of holding permanent residency, through descent from a Thai parent, or through marriage to a Thai national. The pathway is rigorous, with demanding requirements around income, language ability, and personal

Trinidad and Tobago – Citizenship

Trinidad and Tobago citizenship may be obtained through birth, descent, registration, or naturalisation, under the framework established by the Citizenship of the Republic of Trinidad and Tobago Act (Chapter 1:50) and the 1976 Constitution. The majority of foreign nationals who

Switzerland – Citizenship

Swiss citizenship can be acquired through ordinary naturalisation (which demands at least 10 years of lawful residence and a permanent C permit), facilitated naturalisation (open to spouses of Swiss nationals and certain other groups), citizenship by descent, and reinstatement for

Sweden – Citizenship

Swedish citizenship is most commonly acquired through naturalisation following five years of continuous residence (though shorter periods apply in some circumstances), by descent from a Swedish parent, or through a partner route requiring three years of residence. Since 2001, Sweden

South Africa – Citizenship

South African citizenship is available through birth, descent, or naturalisation. The majority of foreign nationals become eligible for naturalisation after holding permanent residence for five years. South Africa recognises dual citizenship, and a landmark Constitutional Court ruling in May 2025

South Korea – Citizenship

Acquiring South Korean citizenship is primarily achieved through naturalisation, which demands a minimum of five years of uninterrupted lawful residence — a requirement that can be shortened to two or three years in specific circumstances, such as for those married

Spain – Citizenship

Spanish citizenship (nacionalidad española) is most commonly acquired through naturalisation following a qualifying period of legal residence — generally 10 years, though this is reduced to as little as 1–2 years for particular categories of applicant. Additional pathways exist through

Slovakia – Citizenship

Slovak citizenship can be obtained through naturalisation following eight years of uninterrupted permanent residence, through ancestry tracing back to Czechoslovak forebears born in what is now Slovakia, or through marriage to a Slovak national after five years of shared residence