Tuvalu:
Tuvaluan, English

Uganda:
English (official national language, taught in grade
schools, used in courts of law and by most newspapers and some radio
broadcasts), Ganda or Luganda (most widely used of the Niger-Congo
languages, preferred for native language publications in the capital
and may be taught in school), other Niger-Congo languages,
Nilo-Saharan languages, Swahili, Arabic

Ukraine:
Ukrainian, Russian, Romanian, Polish, Hungarian

United Arab Emirates:
Arabic (official), Persian, English, Hindi,
Urdu

United Kingdom:
English, Welsh (about 26% of the population of
Wales), Scottish form of Gaelic (about 60,000 in Scotland)

United States:
English, Spanish (spoken by a sizable minority)

Uruguay:
Spanish, Portunol, or Brazilero (Portuguese-Spanish mix on
the Brazilian frontier)

Uzbekistan:
Uzbek 74.3%, Russian 14.2%, Tajik 4.4%, other 7.1%

Vanuatu:
English (official), French (official), pidgin (known as
Bislama or Bichelama)

Venezuela:
Spanish (official), numerous indigenous dialects