Can English Only rules violate my right of free speech?
If, by “free speech” you mean your first amendment rights, the answer is “maybe”. Your rights to freedom of speech can be legally severely curtailed at work. Normally the Constitution of the United States is only implicated if you work for a state or federal government agency which is limiting your speech. In a private workplace Title VII of the Civil Rights Act of 1964 (as amended in 1991) is what provides you protections, and it’s protections are based on prohibitions against race and national origin discrimination. Title VII does not explicitly mention language rights, and so any right that you do have is generally one that flows from provisions making it illegal of employers to “haze” employees because of their race or national origin (and one element of race or national origin, under federal law, may be language). It is general Title VII and other federal laws (such as the Civil Rights Act of 1866) that offers you some ability to speak in your native language in the workplace, and
