No in the UK English, Welsh and Gaelic are all used.
Iceland is considered unilingual as the vast majority of the population speaks Icelandic as their primary language.
The United Kingdom does not have an official language, but de facto it is English. In Wales, Welsh and English are legally equal, and in Scotland, Gaelic is also equal to English. The United Kingdom recognizes Welsh, Scottish Gaelic, Cornish, Irish, Scots and Ulster Scots as minority languages. So no, the UK is not monolingual.
It shouldn't.
The word itself means one tongue (language). If you only speak English, you are unilingual. If you speak two, you are bilingual and if you speak several, you are multilingual.
The United Kingdom is in Europe.
United Kingdom
Probably Saskatchewan or Manitoba.
United Kingdom or The United Kingdom (im guessing tho)
United Kingdom the uk
United Kingdom United Kingdom
The United Kingdom
The United Kingdom.