No, but it is recommended.
They Speak English
english
If you speak English you should be OK
In the UK, people primarily speak British English, which has variations in accent and vocabulary depending on the region. American English is not typically spoken as the primary language in the UK.
English I know that because i am the brain of the UK
The UK is a country and it speaks English. There are no other countries in the UK.
They speak english
While English is the de facto language, the UK actually does not have an official language.Depends on which part of the UK you speak of, but generally, English.
Australia
official languages are English and french
Yes, depending on what dialect you speak. If you speak UK English, Australian English, etc., it is a past tense of the verb "deam", whereas in US English, I think "dreamed" is used.
434 b.C.