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.
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.