Wikipedia has very good resources on the International Phonetic Alphabet: https://en.wikipedia.org/wiki/International_Phonetic_Alphabet https://en.wikipedia.org

Wikipedia has very good resources on the International Phonetic Alphabet: https://en.wikipedia.org/wiki/International_Phonetic_Alphabet https://en.wikipedia.org/wiki/International_Phonetic_Alphabe... But the question is why you would want to do that? No human can speak all the world's languages, or realistically more than a few languages. This article is about a woman who is performing only in English. It is certainly true that non-native speakers can learn a language quite well, after years of immersion and studied effort. Personally I don't think it's impossible for language learners to achieve native-level competence; I just think the number of people who achieve higher levels of competence decreases exponentially.