For many foreigners who come to Hong Kong for work, one of the appeals of the city is its widespread use of English, meaning that many never feel compelled to learn the local Cantonese language. But 29-year-old Australian Jonas Groom has made a splash on social media, where he posts videos of his Cantonese language learning journey, with some of his clips garnering hundreds of thousands of views. Groom, who moved to Hong Kong a little over a year ago and works as a strategy consultant, said he...