This is a massive cope. It is glaringly obvious that the world is losing languages at a higher rate than it is gaining them.

There is a very clear trend towards linguistic consolidation and mass-media, literacy, and the internet / instant communication have accelerated this trend. In my home country of Romania teens often talk to each other in English, even though they all speak Romanian natively. We're also seeing an immense amount of calques, competing with native expressions and often overpowering them. I would honestly not be surprised if in 50 years many national languages start to only be spoken in official circumstances.