When your read a text in English is it possible to notice if it was written by an American or a British person? (a text in standard English, with no slangs and local expressions).
I'm curious about that because I can notice if a text is from Portugal or Brazil, as portuguese is my native language. I mean, it's not that Portuguese is different from one country to another (just few words are spelled in a different way) it's just that we use the same words but with a different structure of the sentence, different verb conjugation, etc.
The spelling differences are significant enough that even relatively short essays will have signs: favor/favour, color/colour, the -ise/ize endings, etc.
There are also differences in vocabulary: lory, boot, bonnet, rug, jumper/truck, trunk, hood, blanket, sweater
Even things like at the weekend, in High Street/on the weekend, on Main Street will be give aways.