What is a native speaker?Exactly. What is it? Who decides which English is the measurement of “good”? You can find a wide variety of accents, pronunciation and vocabulary within every country. A person’s language may depend on region, age, class, subculture and education. It is also important to keep in mind that we all adjust our speech, whether consciously or unconsciously, depending on who we are speaking to and how formal the situation is. This complex phenomenon is known as socio-linguist