Vowel
Like other languages, there are many dialects of English, and different dialects often use different vowel sounds. But the IPA symbols can tell us which vowel sound a dialects uses. For example, some American English speakers differentiate between the vowels in the words cot and caught, while in other dialects these words are homophones. People who study the differences between the dialects of English often study the different way vowel sounds are pronounced.