Correct some errors in the text.

Hi, guys! I must say right away that I'm not an Englishman and don't speak English like you do.
So, this text may have some errors and I ask you to correct them and tell why these errors are called errors.

Each nation has its own culture, and the British are no exception. To become a real lady and a gentleman, one must possess appropriate manners and observe some rules of etiquette.
Since the British are somewhat restrained in nature, this cannot but affect their manner of speaking. It is better to speak calmly and not loudly, since the British do not like excessive emotionality. The main thing is not to go too far with emotionless, to compliment and laugh.
Sometimes in conversation, the British switch to insignificant topics, for example, about the weather or news.
At a meeting, the British shake hands, and it is worth saying that for them it is more a necessity. A pat on the shoulder is considered a sign of tactlessness.
In England, modesty is welcomed, therefore it is unacceptable to boast about yourself and say personal things.
Although representatives of other nationalities want to throw out their emotions on the interlocutor in the dispute, the British are colder in it. They try not to interrupt, not to go personal, listen to the arguments of the interlocutor and calmly bring their own.
It is worth saying that the British have a sense of self-esteem and a little pride. They will never ask for help, even when necessary.
Adherence to tradition doesn't allow the British to be late for lunch or dinner. This will be considered a sign of disrespect for the owners of the house. It's funny that in the Victorian era it was possible and even necessary to be late for social events, so that everyone thought that a person was not in a hurry at the event, abandoning all his affairs.
After lunch, in some public institution, it is customary to leave a tip.
These are the traditions of England, and in order to become a true resident of Foggy Albion, they must be respected.