Q: In the language preferences, what is the difference between British English, English, US English…

You will see subtle differences, however when you press things like the $ on a US Keyboard where the language has been changed to UK English you will see the £ instead.

American and British English differ somewhat by way of spelling.

Eg. Colour (UK) Color (US)

As for plain old English... ??? Maybe it's a combination of the two.

Comparison of American and British English.

-- kaz-k

British English, Canadian English, and American English are each a little different. I did not specifically look at the selection you are describing but I assume that if you want American English you select it. If you want British English you select it. If you are Canadian or some other English speaking nationality then you would select English.

But this is only an assumption on my part because as I said I did not check out your selection options and their differences.

US English abandons the letter U and any slightly complex spelling.

Canadian English puts an 'ey' at the end of every sentence. (and rhymes house with moose)

British English changes the rules on you in ways unexpected, thus weeding out foreigners.

The biggest difference is in the spell cheker, i.e., dictionary...programme/program, colour/color, organise/organize, and so on.

What is the difference between British English, English, Us English .....

That was your question.

British English? Britain and England are not the same thing.

Be specific, what is it you want to know about English (there is only one English language, all the rest are local Patois) or in the case of Louisiana, Creoles.

English is by default US English...like the selections in iOS devices, you have English, English (Australia), English (Canada), English (UK).  By default if you select English you get US English, keyboard and dictionary.

The first post lacks clarity. In any variant of English.