People from America and England both speak English, but they have different accents so they sound a little different. There are also some words that are used in England, but not in America and words that are used in America and not in England.

You can easily look this up online, but the important thing is this: as long as you are speaking standard English, people (in general) will understand you perfectly fine. No tricks here.

The main difference is in the pronounciation and stressed syllables. However, even among the American and English voice, there are distinct regional differences (similar to North Vietnamese vs. South Vietnamese). My favorite example is "water". (Western/ California) American voice: "wah-der" -the t sounds like a very light d. English voice: "waA-Tah" - I can't really explain this one as well, but to me, the t is emphasized more and the overall pronounciation is rounder with the mouth!

You can speak American English, British English or even Canadian and Australian English :v I think they're all OK as long as you don't speak Vietnamese English. :3