CREATE TABLE table_1837570_1 (language VARCHAR, coverage_area VARCHAR)

Which languages are offered in the coverage area of klang petaling jaya shah alam?
SELECT language FROM table_1837570_1 WHERE coverage_area = "Klang Petaling Jaya Shah Alam"
SELECT "language" FROM "table_1837570_1" WHERE "Klang Petaling Jaya Shah Alam" = "coverage_area"