English is not my first language, but I have come to deeply appreciate the idea of a common language that people share so that we can all work together regardless of where in the world we are.
Knowing more than one language adds lots of value, because each language offers different modes of thinking and conception. But also having one common language adds an insane amount of value, because now you can both win by having the capability to exchange ideas with people that otherwise might not happen and the opportunity cost is unpredictable.
(Example - German and Japanese teams use a universal language as a common language to work together on a groundbreaking energy project. That collaboration might not have otherwise happened due to language barriers. But if both parties learn a "Universal language" as a collaborative base, we can all gain advantage from that product of that win-win scenario. )