United Kingdom:
- English (de facto official language)
- Welsh (official language in Wales)
- Scottish Gaelic (official language in Scotland)
- Irish (official language in Northern Ireland)
Republic of Ireland:
- Irish (de jure first official language)
- English (de jure second official language)
Isle of Man:
- English
- Manx (Gaelic language)
Channel Islands:
- English
- French