Entirely agree with you but... Europe not having a common language is one of the things that holds it back from being a stronger competitor against the US and CN. It's just one of the myriad of other things holding EU back.
It is useless to think that we always "have to compete" head to head. We don't have to be bigger than the bull. Frankly the argument is mostly a way to justify EU federalisation and the death of individual countries and cultures for the sake of "uniformisation" like if that was something unavoidable.
I agree that competition between peoples is counterproductive. But this is the world we live in. I also think that in large part international competition is pushed by the US as part of their culture and because they are the leading world power. In this world order, Europeans should be able to sit at the table as equals with other major powers.
Also, why does federalization have to mean the death of cultures? Can't we come up with ideas how to have both?
It is changing slowly, but the dynamics is so complex that it might as well reverse its course. In the mean time they are still dominating and will probably continue to do so over the coming decades (so for a generation or two more).