Donald Trump is seeking to designate an official language in the U.S. for the first time in its nearly 250-year history. Here’s what that means.

The White House said that declaring a national language “promotes unity, establishes efficiency in government operations, and creates a pathway for civic engagement.”

The order is expected to be largely symbolic but would be a victory for America’s English-only movement, which has long had ties to efforts to reduce immigration and restrict bilingual education.