In the year (ceremony) 1998 (71st), what are all the main languages?
CREATE TABLE "table1_26385848_1" (
  "year_ceremony" text,
  "film_title" text,
  "main_language_s" text,
  "director" text,
  "result" text
);
SELECT "main_language_s" FROM "table1_26385848_1" WHERE "year_ceremony"='1998 (71st)';