What is truly fascinating is that just as children have an innate ability to learn language, their caregivers -- anyone from a mother to an older sibling to the teenage babysitter from down the block -- have an innate ability to teach it.
How does immigration boost the economy? There are many reasons, but the short answer is that immigration adds more people who in turn spend more money. Businesses benefit from this spending, a fact reflected in the larger economy.
Every Native American language is in extreme danger. Some of them are looking at language death in the next decade, and some are trying to just stabilize the number of children who are learning and speaking their ancestral languages.
All linguistic minorities deserve to be approached and heard in their home languages whenever possible, because the conversation that results is fuller and richer and you tend to hear things that otherwise might not be said in English.
While the top of the economic pyramid may be dominated by a few players, the knowledge pyramid is inversely skewed, with just 0.2% of the world's population possessing a full 80% of our languages, and the vast knowledge they encode.
It doesn't happen that often any more, but there are still times when my English-born wife gently, and sometimes not so gently, awakens me in the middle of the night to tell me that I have been talking in my sleep again in Spanish.