Table schema:
CREATE TABLE country (Code VARCHAR, HeadOfState VARCHAR); CREATE TABLE countrylanguage (Language VARCHAR, CountryCode VARCHAR, IsOfficial VARCHAR)

Question: What is the official language spoken in the country whose head of state is Beatrix?
SQL: SELECT T2.Language FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE T1.HeadOfState = "Beatrix" AND T2.IsOfficial = "T"