English language requirements
Primary source
Verbatim text below is from the Electronic Code of Federal Regulations (eCFR), a public-domain U.S. government work. Always verify the current version with the eCFR before relying on it for any legal matter.
Full Text
All information required under the act and rules and regulations to appear on labels, invoices, and in advertising, shall be set out in the English language. If labels, invoices or advertising matter contain any of the required information in a language other than English, all of the required information shall appear also in the English language. The provisions of this section shall not apply to advertisements in foreign language newspapers or periodicals, but such advertising shall in all other respects comply with the act and regulations.
This is legal information, not legal advice. Laws vary by jurisdiction and change frequently. Always verify current law with official sources and consult a licensed attorney in your jurisdiction for advice on your specific situation.