- United Kingdom
- English is the de facto official language.
- Cornish (in Cornwall) (minority language)
- Dgèrnésiais (in Guernsey)
- English (in Anguilla, Bermuda, the British Indian Ocean Territory, the British Virgin Islands, the Cayman Islands, the Falkland Islands, Gibraltar, Guernsey, Jersey, Montserrat, Northern Ireland, the Pitcairn Islands, Saint Helena, Scotland, Turks and Caicos Islands, and Wales)
- French (in Guernsey and Jersey)
- Irish (in Northern Ireland) (minority language)
- Jèrriais (in Jersey)
- Pitcairnese (in the Pitcairn Islands)
- Scots (in Northern Ireland and Scotland) (minority language)
- Scottish Gaelic) (in Scotland)
- Welsh (in Wales)
- United States
- English is the de facto official language.
- Carolinian (in the Northern Mariana Islands)
- Chamorro (in Guam and the Northern Mariana Islands)
- English (in Alabama, Alaska, American Samoa, Arkansas, California, Colorado, Florida, Georgia, Guam, Hawaii, Illinois, Indiana, Iowa, Kentucky, Louisiana, Massachusetts, Mississippi, Missouri, Montana, Nebraska, New Hampshire, New Mexico, North Carolina, North Dakota, the Northern Mariana Islands, Puerto Rico, South Carolina, South Dakota, Tennessee, the U.S. Virgin Islands, Utah, Virginia, West Virginia, and Wyoming)
- French (in Louisiana)
- Hawaiian (in Hawaii)
- Samoan (in American Samoa)
- Spanish (in New Mexico and Puerto Rico)
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