Thunberg is a Swedish resident who speaks English as a second language.
Many 2nd generation immigrants speak better English than 6th generation Australians.
These Australians are not jealous of Thunberg’s speech-competence nor do they necessarily want to speak better than her, instead they have a deep-seated bias against people who speak too well.
Greta’s accomplishment as an elite English speaker is amazing for someone born and raised speaking Swedish in a non-English-speaking country; even more-so that she probably hasn’t spent a lifetime nurturing her English.
Most Australians don’t speak clearly and many don’t speak confidently or functionally and it’s not only tradespeople who are impeded but also politicians, judges, air traffic controllers and doctors - it’s across the board.
Perhaps there is some truth in this article but to call Sweden a non-English speaking country is incorrect. All students study English at school and IMHO speak it better than many Australians do upon graduation. They might not use it everyday but the only barrier to speaking great English I have come across is confidence to do so.