"Learning something new will involve using something old."

Over the years, I've been asked some compelling questions in interviews. Questions that required me to think, and think quickly, before I answer. In one interview, I was asked: "If you had to learn a new language, how would you do it?"

Hmm. The clock was ticking. It was an interesting question. Over the years, I've worked with various languages. I've even written my own language. So, where would I start, if I'm going to learn a new language. My first thought was: What do I know about computer languages to start with?