The Muhlenberg legend is an urban legend in the United States and Germany. According to the legend, the single vote of Frederick Muhlenberg, the first-ever Speaker of the US House of Representatives, prevented German from becoming an official language of the United States. The story has a long history and has been told in several variations, which may be based in part on actual events.
The United States, however, has no statutory official language; English has been used on a de facto basis because of its status as the country's predominant language, and has also been designated as the official language of the executive branch of the federal government by an executive order issued on March 1, 2025. At times, various states have passed their own official language laws.