There are 6, not 2:
There are 6 Celtic languages spoken all over the United Kingdom:
Mostly in The UK and Ireland.
Welsh and Gaelic.
Scotland and Wales.
Because - English is not the original language of the UK. The original language was Celtic - spoken right across the UK. However - successive invasions by foreign nationalities (many from Arabia and surrounding areas) brought new languages to our shores. The original Celtic-speakers were forced to retreat into Ireland, Wales & Scotland - where (being separate tribes) they developed their own versions of the Celtic language - which we now call Irish, Welsh & Scottish.
The most commonly spoken language in the UK is English.
The official language of the UK is English.
The main language spoken in the UK is English. However, there are also several regional languages and dialects spoken throughout the country, such as Welsh, Scottish Gaelic, and Irish.
English
klingon
No, Portuguese is not the national language of the UK. The national language of the UK is English. Portuguese is the official language of Portugal and is also spoken in countries like Brazil and Mozambique.
The language common to both countries is English.
The official language spoken in the UK is English. Additionally, some regions in the UK have their own regional languages like Welsh in Wales and Scottish Gaelic in Scotland.
The most numerous are Welsh and Gaelic, members of separate branches of the Celtic languages.
The official language of the UK is English. However, Welsh and Scottish Gaelic are also spoken in those two places. There is also Scots, but that is more of a dialect than a language and the ancient language of Cornish but very few people can speak it.
english, french