Database: world_1
Question: What is the total number of unique official languages (isOfficial is T) spoken in the countries that are founded before 1930?
SQL: 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"