How many translations of the name of the set "Salvat 2011"?
translations of the name refers to translation; translation is not NULL; set "Salvat 2011" refers to name = 'Salvat 2011'
SELECT COUNT(DISTINCT T2.translation) FROM sets AS T1 INNER JOIN set_translations AS T2 ON T2.setCode = T1.code WHERE T1.name = 'Salvat 2011' AND T2.translation IS NOT NULL