What the World Will Speak in 2115 - WSJ

http://www.wsj.com/articles/what-the-world-will-speak-in-2115-1420234648

That's what indigenous languages tend to be like in one way or another. Languages "grow" in complexity the way that people pick up habits and cars pick up rust. One minute the way you mark a verb in the future tense is to use will: I will buy it. The next minute, an idiom kicks in where people say I am going to buy it, because if you are going with the purpose of doing something, it follows that you will. Pretty soon that gels into a new way of putting a verb in the future tense with what a Martian would hear as a new "word," gonna.

---Steve