SELECT T2.Language FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code  =  T2.CountryCode WHERE T1.HeadOfState  =  "Beatrix" AND T2.IsOfficial  =  "T"
What is the official language used in the country the name of whose head of state is Beatrix.
SELECT T2.Language FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE T1.HeadOfState = `` Beatrix '' AND T2.IsOfficial = `` T ''
select t2 . language from country as t1 join countrylanguage as t2 on t1 . code = t2 . countrycode where t1 . headofstate = value and t2 . isofficial = value
What is the official language used in the country the name of whose head of state is Beatrix .