Context: CREATE TABLE country (Code VARCHAR); CREATE TABLE countrylanguage (Language VARCHAR, CountryCode VARCHAR, IsOfficial VARCHAR)
Question: What is the total number of unique official languages spoken in the countries that are founded before 1930?
Answer: SELECT COUNT(DISTINCT T2.Language) FROM country AS T1 JOIN countrylanguage AS T2 ON T1.Code = T2.CountryCode WHERE IndepYear < 1930 AND T2.IsOfficial = "T"