CREATE TABLE table_name_53 (main_language_s_ VARCHAR2, film_title_used_in_nomination VARCHAR2)

What is the primary language used in the film, Black Book?
SELECT main_language_s_ FROM table_name_53 WHERE film_title_used_in_nomination = "black book"
SELECT "main_language_s_" FROM "table_name_53" WHERE "black book" = "film_title_used_in_nomination"