I believe that this is one of the best things that TV has given us - the homogenization, and adoption of the English language. It eases communication and trade across cultures.
It also makes it cheaper to recruit people from all around the world with a given skill. Right now, there's a shortage in skilled welders. There's a massive number of skilled welders in Asia that make bit less money than the welders here do. Why can't we bring them across -- cost of certification? No. It's the language. Language enables globalization.
I'm sure there are still advantages to being bilingual that exist as well, but inventing, or adopting obscure languages to become one's mother tongue only seems counterproductive to me in the long run.