The citizenship of Saint Lucia can be acquired through birth in Saint Lucia, or through birth outside the country to parents that are not Saint Lucian citizens by descent. If one of the adoptive parents is a Saint Lucian citizen, the adopted child can also become a citizen.
How to apply for St. Lucia citizenship?
St. Lucia's passport offers visa-free travel to more than 146 countries worldwide. The gateway to avail of its citizenship has simple procedures, no need to take any language proficiency tests or need of residents permit card.
St. Lucia citizenship requirements
To qualify, the main applicant must be 18 years or older, meet the eligibility requirements.
The main investment routes to apply for St.Lucia citizenship are,
By donation
Real estate investment
Purchasing bonds or investing in a business.
Investment in St.Lucia Covid-19 Relief Bond
Source: https://www.pa-ic.com/caribbean-immigration/st-lucia-for-citizenship/