1, British English (BrE, BE, en-GB), also known as British English, mainly refers to the English rules of English people living in the British Isles, and is the official language of the British mainland and Commonwealth countries.
2. American English (English: American English for short) is a form of English used in the United States and the most important language in the United States. It originated from Elizabethan English and is more conservative than British English in phonology. Most contemporary North American English has tongue rolling. American language embodies the social characteristics of the United States and has the characteristics of a "melting pot", which is formed by integration of language in countries such as Hindi, Dutch, German, French and Spanish.
3. Use different words. Some common meanings of the same words in English and American English are different, or the same thing is said in different words, which are mostly related to cultural customs, but have no substantive influence on communication. The words used in English and American English are different and involve many small aspects of life. For another example, in education, the British call it a public school, while the United States calls it a preparatory school, which refers to a private school sponsored by the private sector and attended by rich children. Its purpose is to prepare students for further study in colleges and universities in the future. Government-funded public schools in the United States are called council school in Britain because they are under the jurisdiction of the education committee of the county council. The Class in British schools is called form, and the class in American schools is called grade or Class. Boys in British universities are called college boys. In American universities, they are called college boys. Teachers in British universities are called staff, collectively referred to as dons, while teachers in American universities are called potential. For example, sidewalks are called pavements in Britain and sidewalks in America. British people call wallets wallets (women's) or wallets (men's), while Americans call them pocketbook. Notebooks or memos called pocketbook in Britain are called memos in America. When eating, Americans call the last course dessert, while the British only call the fruit dessert and the rest pudding. In Britain and the United States, there are different versions of a company limited by shares. In Britain, it is called limited liability, and it says Ltd., such as Matsushita Electric Trading Co., Ltd., and in the United States it is called incorporated, and it says Inc., such as Tandem Manufacturing Inc These are just a few examples. In fact, there are countless differences in vocabulary between English and American English.