Yu Cong Eng v. Trinidad, 271 U.S. 500 (1926), was a legal case in which the Supreme Court of the United States decided that a law passed by the U.S. colonial government of the Philippines in 1921 — Act No. 2972 of the Philippine Legislature, known as the "Chinese Bookkeeping Act" — which prevented business records from being kept in the Chinese language, was unconstitutional.