Because some British people are polite.
Saying 'excuse me' is good manners.
For example: 'excuse me, I need to visit the loo'.
Or 'Oh, excuse me, I didn't realise you were in here'.
It is also said after a burp.
It's very common to hear Canadians say 'Excuse me' or 'Pardon me' when asking someone to repeat themselves. Not many people would say 'excuse you' or 'pardon you' though, that would sound a bit rude.
because a lot of people use that excuse to say them
Please Thanks Excuse me
No, French people typically do not use the phrase "Excuse my English" when they swear. Instead, they may simply swear in French without mentioning their language skills.
say you just like their buildings
The British say 'z' as zed.
British people say quite a lot of things. They are sometimes known to say, God save the queen.
they mostly say that tey were driving
In British English, the term for cousin is the same as in American English. It is simply "cousin."
No. They just tend to say "excusez-moi" or apologise in a similar way.
Rasta char hotobhaga
In Yoruba language, you can say "Ẹ ṣè" to mean Excuse me.