The cash languages in USA-Asia relations will continue to be Japanese and Korean, as they are the high-end consumers.
The labor languages will be Vietnamese, Filipino, Spanish, and Chinese, as they are the low-end mass-producers.
Though, the Chinese economy and markets are rapidly changing -- I fully expect China to evolve from a source of labor to a source of consumers within the next 20 years. That is, if North Korea doesn't launch their nuclear weapons at China . . .
(Yes, I am Chinese)