Donald Trump is on track to make history by signing an executive order that would designate English as the official language of the United States, according to multiple White House sources.

While English is already the most widely spoken language in the country, the U.S. has never formally declared an official language at the federal level in its nearly 250-year history.

However, every major national document, including the Constitution and the Declaration of Independence, has been written in English.

During his campaign last year, Trump criticized the increasing presence of other languages in the U.S., stating at the Conservative Political Action Conference:

“We have languages coming into our country.

“These are languages – it’s the craziest thing – they have languages that nobody in this country has ever heard of. It’s a very horrible thing.”

Trump is set to sign the executive order, which would overturn a directive issued by former President Bill Clinton in 2000 that required federal agencies and recipients of federal funding to provide language assistance for non-English speakers, as reported by The Wall Street Journal.

“Establishing English as the official language promotes unity, establishes efficiency in government operations, and creates a pathway for civic engagement,” the White House outlined in a fact sheet shared with ABC News.

Since his official inauguration on January 20—just over a month ago—the 78-year-old Republican leader has signed at least 70 executive orders.

Some of these orders include renaming the Gulf of Mexico to the Gulf of America, banning gender transitions for individuals under 19, and ending birthright citizenship.