CREATE TABLE table_14839 ("Country" TEXT, "Film title used in nomination" TEXT, "Language" TEXT, "Original name" TEXT, "Director" TEXT)

Which Language Director of nagisa oshima use in his film?
SELECT "Language" FROM table_14839 WHERE "Director" = 'nagisa oshima'
SELECT "Language" FROM "table_14839" WHERE "Director" = 'nagisa oshima'