@elbanditoroso Chacun a son gout. Both Cantonese and Mandarin are just awful to listen to, by my Western ear. Sound like cats being gutted.
Personally, I think French is about best, except the French Academy doesn’t like French to evolve. Otherwise, it would be to me a clear winner. So English is the most useful because it adapts new terms and meanings, and can express the most technical meanings and the most emotional. But it is hard to learn, it has a lot of exceptions to every rule.